Interconnection of Heterogeneous Networks. Internetworking. Service model. Addressing Address mapping Automatic host configuration

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Interconnection of Heterogeneous Networks. Internetworking. Service model. Addressing Address mapping Automatic host configuration"

Transcription

1 Interconnection of Heterogeneous Networks Internetworking Service model Addressing Address mapping Automatic host configuration Wireless LAN outer Ethernet PPS Internet-Praktikum Internetworking 1 PPS Internet-Praktikum Internetworking 3 Successful Example: IP Technology IP Protocol Stack Key elements of the technology used in the Internet: Internet = Network of networks Many physical sub-network technologies Distributed management Packet switching, using datagrams No connection-dependent state information in the network One network protocol Two transport protocols Infrastructure for hundreds of different distributed applications Scalability: to accommodate growth Application Transport Internet Phys. Network HTTP TCP IP Ethernet FTP ATM DNS UDP outing DECnet PPS Internet-Praktikum Internetworking 2 PPS Internet-Praktikum Internetworking 4

2 Example of a small Internet The Internet Service Model Connectionless, unreliable service Datagram = packet A packet may be sent to a destination identified by ist (globally unique) address No quality of service guarantees eliability Throughput Delay Delay jitter not guaranteed Best effort service Source: Computer Networks PPS Internet-Praktikum Internetworking 5 PPS Internet-Praktikum Internetworking 7 Layered view of internetworking example Format of an IP packet 32 Bit Version Header length Type of service Total length Identification Flags Fragment offset Time to live Protocol Header checksum Source IP address Destination IP address IP options (if any) Padding to 32 bits Payload PPS Internet-Praktikum Internetworking 6 PPS Internet-Praktikum Internetworking 8

3 Type of service byte Initially meant to be used to indicate the type of service needed for the application Currently not used However, was re-discovered for the new quality of service model for the differentiated service Internet Precedence D T Unused Avoiding fragmentation Always send small datagrams: There is some datagram size that is small enough to fit without fragmentation on any network; we could simply send no datagrams larger than this limit. Guess minimum MTU of path: Use a heuristic to guess the minimum MTU along the path the datagram will follow. Discover actual minimum MTU of path: Use a protocol to determine the actual minimum MTU along the path the datagram will follow. Guess or discover MTU and backtrack if wrong: Since an estimate might be wrong, and a discovered MTU may change if a route changes, sometimes we may have to adjust the length limit. This requires both a mechanism for detecting errors, and a mechanism for correcting them. Kent & Mogul: Fragmentation Considered Harmful, Computer Communication eview, vol. 17, no. 5, pp PPS Internet-Praktikum Internetworking 9 PPS Internet-Praktikum Internetworking 11 Fragmentation Addressing 1 2 Net 1, MTU = 1500 outer 1 Net 2 MTU=620 outer 2 Net 3, MTU = Fragmentation is requred when a packet longer than the MTU of a network needs to be tranferred through the network e-assembly is done at the end-point Several levels of fragmentation are possible, but not recommended IP addresses are 32 bits long They reflect the internetworking architecture of the Internet (network number, host number) Where do we have to set the boundary network/host? Addresses have to be globally unique Allocation mechanism? Are there enough IP addresses? PPS Internet-Praktikum Internetworking 10 PPS Internet-Praktikum Internetworking 12

4 Evolution of Internet Addressing Initial addressing scheme (1973) Class-based addressing (from 1981) See next slide Class-less inter-domain routing (CID, from 1993) What are addressable entities? An IP address identifies an interface outers typically have more than one IP address s may have multiple IP addresses Network 1 I 1 I 3 I 4 1 I 2 I 5 2 Address prefix used for inter-domain routing Network Id with intra-domain routing significance Id Network 2 PPS Internet-Praktikum Internetworking 13 PPS Internet-Praktikum Internetworking 15 Classes of IP addresses User-friendly representation of addresses Four decimal numbers represent one octet each, e.g Class A: between 1 and 126 Class B: between and Class C: between and To identify a network, the network part of the address is set to 0: To address all entities in a network (broadcast), the host part is set to all 1s, e.g Class A network 127 is the loopback network, e.g is the (a) loopback address CID address prefix: /16 PPS Internet-Praktikum Internetworking 14 PPS Internet-Praktikum Internetworking 16

5 Address mapping How does an IP packet forwarded from a router to a host actually reach that host? Ethernet 1 I1 = Ethernet Network Network The Address esolution Protocol (AP) If MAC address not known: Send broadcast AP request whois IP address x? Owner of IP address x answers with (directed) AP reply equestor stores (IP address/mac address) pair in its AP cache Note: The AP protocol is only executed between neighboring nodes (e.g. host and next router, host and host) PPS Internet-Praktikum Internetworking 17 PPS Internet-Praktikum Internetworking 19 Mapping IP address to MAC address The router needs to know the MAC address of the host in order to send the frame containing the IP packet to the host. Ethernet 1 I1 = Network Simple forwarding table example Internet I 4 = I 3 = Network 1 = /24 1 Ethernet 2 0a f-3e Network I 1 = I 2 = Network 2 = / (MyAddr) (MyAddr) /24 local-i /24 local-i2 default (MyAddr) /24 local default PPS Internet-Praktikum Internetworking 18 PPS Internet-Praktikum Internetworking 20

6 Internet Control Message Protocol (ICMP) Signaling protocol Used to signal errors or simple control elements between hosts and routers, e.g.: When a packet is dropped To check whether an interface can be reached To change the first hop from a host towards some destination Logically on the same level as IP, but ICMP messages are carried in IP packets Subnetting Subnetting provides flexibility for network-internal addressing of subnetworks Network administrators have the freedom to structure their own A/B/C address space into a few or many subnetworks Class B 10 Net ID ID Subnet 10 Net ID Subnet ID ID 16 Bits n Bits 16-n Bits Subnet mask Example: Net , Mask = 10 Bit Subnet PPS Internet-Praktikum Internetworking 21 PPS Internet-Praktikum Internetworking 23 Some ICMP message types 0 Echo response 3 Destination unreachable 4 "Source Quench" 5 oute change 8 Echo request 11 Packet dropped because of TTL exceeded 12 Packet dropped because of a parameter error Important host configuration parameters IP address Subnet mask Default router... Set by hand or automatically via the Dynamic Configuration Protocol (DHCP) etc Type (3) Code (0-12) Checksum Unused (=0) Header of related packet and first 64 bits of payload PPS Internet-Praktikum Internetworking 22 PPS Internet-Praktikum Internetworking 24

7 Why DHCP? Automatic configuration of hosts Parameters: IP address (default) router addresses IP mask to support subnetting Addresses of the DNS server(s) Link MTU, default time-to-live and many more, see appendix A of FC 2131 Without DHCP: do it by hand (network control panel, registry, configuration script, etc.) Some parameters may only be settable via DHCP Sometimes you have to reboot after changing the parameters by hand PPS Internet-Praktikum Internetworking 25 Typical scenario Server (not chosen) Client Server (chosen) Determines config t Chooses server Client is configured PPS Internet-Praktikum Internetworking 27 Determines config Principles of DHCP Client/server model: Clients (hosts) receive configuration parameters from a server Components DHCP Client/Server protocol Mechanism for address allocation Address allocation: Automatic/static - DHCP sets a permanent address dynamic - DHCP provides an address for some lease time manual Assignment of addresses pre-set by the administrator Mode of operation may be set by the administrator PPS Internet-Praktikum Internetworking 26

PPS Internet-Praktikum. Prof. Bernhard Plattner Institut für Technische Informatik und Kommunikationsnetze (TIK)

PPS Internet-Praktikum. Prof. Bernhard Plattner Institut für Technische Informatik und Kommunikationsnetze (TIK) PPS Internet-Praktikum Prof. Bernhard Plattner Institut für Technische Informatik und Kommunikationsnetze (TIK) September 2011 Zielsetzung Von unserer Webpage: Das Ziel dieser PPS-Veranstaltung ist es,

More information

Themen der Praktikumsnachmittage. PPS Internet-Praktikum. Zielsetzung. Infrastruktur im ETF B5

Themen der Praktikumsnachmittage. PPS Internet-Praktikum. Zielsetzung. Infrastruktur im ETF B5 PPS Internet-Praktikum Prof. Bernhard Plattner Institut für Technische Informatik und Kommunikationsnetze (TIK) Themen der Praktikumsnachmittage Aufbau und Analyse eines kleinen Netzwerks Routing Anwendungen

More information

IP - The Internet Protocol

IP - The Internet Protocol Orientation IP - The Internet Protocol IP (Internet Protocol) is a Network Layer Protocol. IP s current version is Version 4 (IPv4). It is specified in RFC 891. TCP UDP Transport Layer ICMP IP IGMP Network

More information

Lecture 15. IP address space managed by Internet Assigned Numbers Authority (IANA)

Lecture 15. IP address space managed by Internet Assigned Numbers Authority (IANA) Lecture 15 IP Address Each host and router on the Internet has an IP address, which consist of a combination of network number and host number. The combination is unique; no two machines have the same

More information

Internetworking. Problem: There is more than one network (heterogeneity & scale)

Internetworking. Problem: There is more than one network (heterogeneity & scale) Internetworking Problem: There is more than one network (heterogeneity & scale) Hongwei Zhang http://www.cs.wayne.edu/~hzhang Internetworking: Internet Protocol (IP) Routing and scalability Group Communication

More information

Lecture Computer Networks

Lecture Computer Networks Prof. Dr. H. P. Großmann mit M. Rabel sowie H. Hutschenreiter und T. Nau Sommersemester 2012 Institut für Organisation und Management von Informationssystemen Thomas Nau, kiz Lecture Computer Networks

More information

Network Security TCP/IP Refresher

Network Security TCP/IP Refresher Network Security TCP/IP Refresher What you (at least) need to know about networking! Dr. David Barrera Network Security HS 2014 Outline Network Reference Models Local Area Networks Internet Protocol (IP)

More information

Computer Networks. Lecture 3: IP Protocol. Marcin Bieńkowski. Institute of Computer Science University of Wrocław

Computer Networks. Lecture 3: IP Protocol. Marcin Bieńkowski. Institute of Computer Science University of Wrocław Computer Networks Lecture 3: IP Protocol Marcin Bieńkowski Institute of Computer Science University of Wrocław Computer networks (II UWr) Lecture 3 1 / 24 In previous lectures We learned about layer 1

More information

8.2 The Internet Protocol

8.2 The Internet Protocol TCP/IP Protocol Suite HTTP SMTP DNS RTP Distributed applications Reliable stream service TCP UDP User datagram service Best-effort connectionless packet transfer Network Interface 1 IP Network Interface

More information

RARP: Reverse Address Resolution Protocol

RARP: Reverse Address Resolution Protocol SFWR 4C03: Computer Networks and Computer Security January 19-22 2004 Lecturer: Kartik Krishnan Lectures 7-9 RARP: Reverse Address Resolution Protocol When a system with a local disk is bootstrapped it

More information

Internetworking and IP Address

Internetworking and IP Address Lecture 8 Internetworking and IP Address Motivation of Internetworking Internet Architecture and Router Internet TCP/IP Reference Model and Protocols IP Addresses - Binary and Dotted Decimal IP Address

More information

CS 43: Computer Networks IP. Kevin Webb Swarthmore College November 5, 2013

CS 43: Computer Networks IP. Kevin Webb Swarthmore College November 5, 2013 CS 43: Computer Networks IP Kevin Webb Swarthmore College November 5, 2013 Reading Quiz IP datagram format IP protocol version number header length (bytes) type of data max number remaining hops (decremented

More information

Chapter 3: Review of Important Networking Concepts. Magda El Zarki Dept. of CS UC Irvine elzarki@uci.edu http://www.ics.uci.

Chapter 3: Review of Important Networking Concepts. Magda El Zarki Dept. of CS UC Irvine elzarki@uci.edu http://www.ics.uci. Chapter 3: Review of Important Networking Concepts Magda El Zarki Dept. of CS UC Irvine elzarki@uci.edu http://www.ics.uci.edu/~magda 1 Networking Concepts Protocol Architecture Protocol Layers Encapsulation

More information

Network layer: Overview. Network layer functions IP Routing and forwarding

Network layer: Overview. Network layer functions IP Routing and forwarding Network layer: Overview Network layer functions IP Routing and forwarding 1 Network layer functions Transport packet from sending to receiving hosts Network layer protocols in every host, router application

More information

Ethernet. Ethernet. Network Devices

Ethernet. Ethernet. Network Devices Ethernet Babak Kia Adjunct Professor Boston University College of Engineering ENG SC757 - Advanced Microprocessor Design Ethernet Ethernet is a term used to refer to a diverse set of frame based networking

More information

2. IP Networks, IP Hosts and IP Ports

2. IP Networks, IP Hosts and IP Ports 1. Introduction to IP... 1 2. IP Networks, IP Hosts and IP Ports... 1 3. IP Packet Structure... 2 4. IP Address Structure... 2 Network Portion... 2 Host Portion... 3 Global vs. Private IP Addresses...3

More information

Guide to Network Defense and Countermeasures Third Edition. Chapter 2 TCP/IP

Guide to Network Defense and Countermeasures Third Edition. Chapter 2 TCP/IP Guide to Network Defense and Countermeasures Third Edition Chapter 2 TCP/IP Objectives Explain the fundamentals of TCP/IP networking Describe IPv4 packet structure and explain packet fragmentation Describe

More information

Future Internet Technologies

Future Internet Technologies Future Internet Technologies Traditional Internet Dr. Dennis Pfisterer Institut für Telematik, Universität zu Lübeck http://www.itm.uni-luebeck.de/people/pfisterer Internet Protocol v4 (IPv4) IPv4 Model

More information

Internetworking and Internet-1. Global Addresses

Internetworking and Internet-1. Global Addresses Internetworking and Internet Global Addresses IP servcie model has two parts Datagram (connectionless) packet delivery model Global addressing scheme awaytoidentifyall H in the internetwork Properties

More information

04 Internet Protocol (IP)

04 Internet Protocol (IP) SE 4C03 Winter 2007 04 Internet Protocol (IP) William M. Farmer Department of Computing and Software McMaster University 29 January 2007 Internet Protocol (IP) IP provides a connectionless packet delivery

More information

Mobile IP Network Layer Lesson 02 TCP/IP Suite and IP Protocol

Mobile IP Network Layer Lesson 02 TCP/IP Suite and IP Protocol Mobile IP Network Layer Lesson 02 TCP/IP Suite and IP Protocol 1 TCP/IP protocol suite A suite of protocols for networking for the Internet Transmission control protocol (TCP) or User Datagram protocol

More information

Guide to TCP/IP, Third Edition. Chapter 3: Data Link and Network Layer TCP/IP Protocols

Guide to TCP/IP, Third Edition. Chapter 3: Data Link and Network Layer TCP/IP Protocols Guide to TCP/IP, Third Edition Chapter 3: Data Link and Network Layer TCP/IP Protocols Objectives Understand the role that data link protocols, such as SLIP and PPP, play for TCP/IP Distinguish among various

More information

Internet Control Protocols Reading: Chapter 3

Internet Control Protocols Reading: Chapter 3 Internet Control Protocols Reading: Chapter 3 ARP - RFC 826, STD 37 DHCP - RFC 2131 ICMP - RFC 0792, STD 05 1 Goals of Today s Lecture Bootstrapping an end host Learning its own configuration parameters

More information

Network Layer IPv4. Dr. Sanjay P. Ahuja, Ph.D. Fidelity National Financial Distinguished Professor of CIS. School of Computing, UNF

Network Layer IPv4. Dr. Sanjay P. Ahuja, Ph.D. Fidelity National Financial Distinguished Professor of CIS. School of Computing, UNF Network Layer IPv4 Dr. Sanjay P. Ahuja, Ph.D. Fidelity National Financial Distinguished Professor of CIS School of Computing, UNF IPv4 Internet Protocol (IP) is the glue that holds the Internet together.

More information

Course Overview: Learn the essential skills needed to set up, configure, support, and troubleshoot your TCP/IP-based network.

Course Overview: Learn the essential skills needed to set up, configure, support, and troubleshoot your TCP/IP-based network. Course Name: TCP/IP Networking Course Overview: Learn the essential skills needed to set up, configure, support, and troubleshoot your TCP/IP-based network. TCP/IP is the globally accepted group of protocols

More information

BASIC ANALYSIS OF TCP/IP NETWORKS

BASIC ANALYSIS OF TCP/IP NETWORKS BASIC ANALYSIS OF TCP/IP NETWORKS INTRODUCTION Communication analysis provides powerful tool for maintenance, performance monitoring, attack detection, and problems fixing in computer networks. Today networks

More information

IP Addressing Introductory material.

IP Addressing Introductory material. IP Addressing Introductory material. A module devoted to IP addresses. Addresses & Names Hardware (Layer 2) Lowest level Ethernet (MAC), Serial point-to-point,.. Network (Layer 3) IP IPX, SNA, others Transport

More information

Introduction to TCP/IP

Introduction to TCP/IP Introduction to TCP/IP Raj Jain The Ohio State University Columbus, OH 43210 Nayna Networks Milpitas, CA 95035 Email: Jain@ACM.Org http://www.cis.ohio-state.edu/~jain/ 1 Overview! Internetworking Protocol

More information

IP addressing and forwarding Network layer

IP addressing and forwarding Network layer The Internet Network layer Host, router network layer functions: IP addressing and forwarding Network layer Routing protocols path selection RIP, OSPF, BGP Transport layer: TCP, UDP forwarding table IP

More information

Technical Support Information Belkin internal use only

Technical Support Information Belkin internal use only The fundamentals of TCP/IP networking TCP/IP (Transmission Control Protocol / Internet Protocols) is a set of networking protocols that is used for communication on the Internet and on many other networks.

More information

Introduction to IP v6

Introduction to IP v6 IP v 1-3: defined and replaced Introduction to IP v6 IP v4 - current version; 20 years old IP v5 - streams protocol IP v6 - replacement for IP v4 During developments it was called IPng - Next Generation

More information

Internet Protocols. Addressing & Services. Updated: 9-29-2012

Internet Protocols. Addressing & Services. Updated: 9-29-2012 Internet Protocols Addressing & Services Updated: 9-29-2012 Virtual vs. Physical Networks MAC is the part of the underlying network MAC is used on the LAN What is the addressing mechanism in WAN? WAN is

More information

IP Addressing. IP Addresses. Introductory material.

IP Addressing. IP Addresses. Introductory material. IP Addressing Introductory material. An entire module devoted to IP addresses. IP Addresses Structure of an IP address Classful IP addresses Limitations and problems with classful IP addresses Subnetting

More information

- IPv4 Addressing and Subnetting -

- IPv4 Addressing and Subnetting - 1 Hardware Addressing - IPv4 Addressing and Subnetting - A hardware address is used to uniquely identify a host within a local network. Hardware addressing is a function of the Data-Link layer of the OSI

More information

Procedure: You can find the problem sheet on Drive D: of the lab PCs. 1. IP address for this host computer 2. Subnet mask 3. Default gateway address

Procedure: You can find the problem sheet on Drive D: of the lab PCs. 1. IP address for this host computer 2. Subnet mask 3. Default gateway address Objectives University of Jordan Faculty of Engineering & Technology Computer Engineering Department Computer Networks Laboratory 907528 Lab.4 Basic Network Operation and Troubleshooting 1. To become familiar

More information

IP Network Layer. Datagram ID FLAG Fragment Offset. IP Datagrams. IP Addresses. IP Addresses. CSCE 515: Computer Network Programming TCP/IP

IP Network Layer. Datagram ID FLAG Fragment Offset. IP Datagrams. IP Addresses. IP Addresses. CSCE 515: Computer Network Programming TCP/IP CSCE 515: Computer Network Programming TCP/IP IP Network Layer Wenyuan Xu Department of Computer Science and Engineering University of South Carolina IP Datagrams IP is the network layer packet delivery

More information

IP address format: Dotted decimal notation: 10000000 00001011 00000011 00011111 128.11.3.31

IP address format: Dotted decimal notation: 10000000 00001011 00000011 00011111 128.11.3.31 IP address format: 7 24 Class A 0 Network ID Host ID 14 16 Class B 1 0 Network ID Host ID 21 8 Class C 1 1 0 Network ID Host ID 28 Class D 1 1 1 0 Multicast Address Dotted decimal notation: 10000000 00001011

More information

Chapter 3. TCP/IP Networks. 3.1 Internet Protocol version 4 (IPv4)

Chapter 3. TCP/IP Networks. 3.1 Internet Protocol version 4 (IPv4) Chapter 3 TCP/IP Networks 3.1 Internet Protocol version 4 (IPv4) Internet Protocol version 4 is the fourth iteration of the Internet Protocol (IP) and it is the first version of the protocol to be widely

More information

1 Data information is sent onto the network cable using which of the following? A Communication protocol B Data packet

1 Data information is sent onto the network cable using which of the following? A Communication protocol B Data packet Review questions 1 Data information is sent onto the network cable using which of the following? A Communication protocol B Data packet C Media access method D Packages 2 To which TCP/IP architecture layer

More information

IP Addressing A Simplified Tutorial

IP Addressing A Simplified Tutorial Application Note IP Addressing A Simplified Tutorial July 2002 COMPAS ID 92962 Avaya Labs 1 All information in this document is subject to change without notice. Although the information is believed to

More information

Gary Hecht Computer Networking (IP Addressing, Subnet Masks, and Packets)

Gary Hecht Computer Networking (IP Addressing, Subnet Masks, and Packets) Gary Hecht Computer Networking (IP Addressing, Subnet Masks, and Packets) The diagram below illustrates four routers on the Internet backbone along with two companies that have gateways for their internal

More information

The internetworking solution of the Internet. Single networks. The Internet approach to internetworking. Protocol stacks in the Internet

The internetworking solution of the Internet. Single networks. The Internet approach to internetworking. Protocol stacks in the Internet The internetworking solution of the Internet Prof. Malathi Veeraraghavan Elec. & Comp. Engg. Dept/CATT Polytechnic University mv@poly.edu What is the internetworking problem: how to connect different types

More information

Internet Protocols Fall 2005. Lectures 7-8 Andreas Terzis

Internet Protocols Fall 2005. Lectures 7-8 Andreas Terzis Internet Protocols Fall 2005 Lectures 7-8 Andreas Terzis Outline Internet Protocol Service Model Fragmentation Addressing Original addressing scheme Subnetting CIDR Forwarding ICMP ARP Address Shortage

More information

FINAL ASSESSMENT/EXAMINATION JULY 2015 PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE YOU BEGIN THIS EXAMINATION

FINAL ASSESSMENT/EXAMINATION JULY 2015 PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE YOU BEGIN THIS EXAMINATION THE UNIVERSITY OF TRINIDAD & TOBAGO FINAL ASSESSMENT/EXAMINATION JULY 2015 Course Code and Title: CNET 2001 Network Architecture Programme: B.A.Sc. ICT Computer Engineering Date: Tuesday July 28, 2015

More information

Networking Test 4 Study Guide

Networking Test 4 Study Guide Networking Test 4 Study Guide True/False Indicate whether the statement is true or false. 1. IPX/SPX is considered the protocol suite of the Internet, and it is the most widely used protocol suite in LANs.

More information

The Internet. Internet Technologies and Applications

The Internet. Internet Technologies and Applications The Internet Internet Technologies and Applications Aim and Contents Aim: Review the main concepts and technologies used in the Internet Describe the real structure of the Internet today Contents: Internetworking

More information

Internet Protocol: IP packet headers. vendredi 18 octobre 13

Internet Protocol: IP packet headers. vendredi 18 octobre 13 Internet Protocol: IP packet headers 1 IPv4 header V L TOS Total Length Identification F Frag TTL Proto Checksum Options Source address Destination address Data (payload) Padding V: Version (IPv4 ; IPv6)

More information

Lecture 8. IP Fundamentals

Lecture 8. IP Fundamentals Lecture 8. Internet Network Layer: IP Fundamentals Outline Layer 3 functionalities Internet Protocol (IP) characteristics IP packet (first look) IP addresses Routing tables: how to use ARP Layer 3 functionalities

More information

Internet Working 5 th lecture. Chair of Communication Systems Department of Applied Sciences University of Freiburg 2004

Internet Working 5 th lecture. Chair of Communication Systems Department of Applied Sciences University of Freiburg 2004 5 th lecture Chair of Communication Systems Department of Applied Sciences University of Freiburg 2004 1 43 Last lecture Lecture room hopefully all got the message lecture on tuesday and thursday same

More information

Scaling the Network: Subnetting and Other Protocols. Networking CS 3470, Section 1

Scaling the Network: Subnetting and Other Protocols. Networking CS 3470, Section 1 Scaling the Network: Subnetting and Other Protocols Networking CS 3470, Section 1 Today CIDR Subnetting Private IP addresses ICMP, IMAP, and DHCP Protocols 2 Packet Encapsulation ** Creative Commons: http://en.wikipedia.org/wiki/file:udp_encapsulation.svg

More information

CS335 Sample Questions for Exam #2

CS335 Sample Questions for Exam #2 CS335 Sample Questions for Exam #2.) Compare connection-oriented with connectionless protocols. What type of protocol is IP? How about TCP and UDP? Connection-oriented protocols Require a setup time to

More information

Note! The problem set consists of two parts: Part I: The problem specifications pages Part II: The answer pages

Note! The problem set consists of two parts: Part I: The problem specifications pages Part II: The answer pages Part I: The problem specifications NTNU The Norwegian University of Science and Technology Department of Telematics Note! The problem set consists of two parts: Part I: The problem specifications pages

More information

Network Basics GRAPHISOFT. for connecting to a BIM Server. 2009 (version 1.0)

Network Basics GRAPHISOFT. for connecting to a BIM Server. 2009 (version 1.0) for connecting to a BIM Server GRAPHISOFT 2009 (version 1.0) Basic Vocabulary...3 Local Area Networks...5 Examples of Local Area Networks...5 Example 1: LAN of two computers without any other network devices...5

More information

Network layer" 1DT066! Distributed Information Systems!! Chapter 4" Network Layer!! goals: "

Network layer 1DT066! Distributed Information Systems!! Chapter 4 Network Layer!! goals: 1DT066! Distributed Information Systems!! Chapter 4" Network Layer!! Network layer" goals: "! understand principles behind layer services:" " layer service models" " forwarding versus routing" " how a

More information

CSE331: Introduction to Networks and Security. Lecture 8 Fall 2006

CSE331: Introduction to Networks and Security. Lecture 8 Fall 2006 CSE331: Introduction to Networks and Security Lecture 8 Fall 2006 Announcements Reminders: Project I is due on Monday, Sept. 25th. Homework 1 is due on Friday, Sept. 29th. CSE331 Fall 2004 2 Internet Protocol

More information

IP Address Classes (Some are Obsolete) 15-441 Computer Networking. Important Concepts. Subnetting 15-441 15-641. Lecture 8 IP Addressing & Packets

IP Address Classes (Some are Obsolete) 15-441 Computer Networking. Important Concepts. Subnetting 15-441 15-641. Lecture 8 IP Addressing & Packets Address Classes (Some are Obsolete) 15-441 15-441 Computer Networking 15-641 Class A 0 Network ID Network ID 8 16 Host ID Host ID 24 32 Lecture 8 Addressing & Packets Peter Steenkiste Fall 2013 www.cs.cmu.edu/~prs/15-441-f13

More information

Transport and Network Layer

Transport and Network Layer Transport and Network Layer 1 Introduction Responsible for moving messages from end-to-end in a network Closely tied together TCP/IP: most commonly used protocol o Used in Internet o Compatible with a

More information

Classful IP Addressing. Classless Addressing: CIDR. Routing & Forwarding: Logical View of a Router. IP Addressing: Basics

Classful IP Addressing. Classless Addressing: CIDR. Routing & Forwarding: Logical View of a Router. IP Addressing: Basics Switching and Forwarding Switching and Forwarding Generic Router rchitecture Forwarding Tables: ridges/layer Switches; VLN Routers and Layer 3 Switches Forwarding in Layer 3 (Network Layer) Network Layer

More information

PART IV. Network Layer

PART IV. Network Layer PART IV Network Layer Position of network layer Network layer duties Internetworking : heterogeneous Physical Networks To look Like a single network to he upper layers The address at Network layer must

More information

Chapter 4 Network Layer

Chapter 4 Network Layer Chapter 4 Network Layer A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add, modify, and delete

More information

2057-15. First Workshop on Open Source and Internet Technology for Scientific Environment: with case studies from Environmental Monitoring

2057-15. First Workshop on Open Source and Internet Technology for Scientific Environment: with case studies from Environmental Monitoring 2057-15 First Workshop on Open Source and Internet Technology for Scientific Environment: with case studies from Environmental Monitoring 7-25 September 2009 TCP/IP Networking Abhaya S. Induruwa Department

More information

Internet Protocol (IP) IP - Network Layer. IP Routing. Advantages of Connectionless. CSCE 515: Computer Network Programming ------ IP routing

Internet Protocol (IP) IP - Network Layer. IP Routing. Advantages of Connectionless. CSCE 515: Computer Network Programming ------ IP routing Process Process Process Layer CSCE 515: Computer Network Programming ------ IP routing Wenyuan Xu ICMP, AP & AP TCP IP UDP Transport Layer Network Layer Department of Computer Science and Engineering University

More information

Final for ECE374 05/06/13 Solution!!

Final for ECE374 05/06/13 Solution!! 1 Final for ECE374 05/06/13 Solution!! Instructions: Put your name and student number on each sheet of paper! The exam is closed book. You have 90 minutes to complete the exam. Be a smart exam taker -

More information

Address Resolution Protocol (ARP), Reverse ARP, Internet Protocol (IP)

Address Resolution Protocol (ARP), Reverse ARP, Internet Protocol (IP) Tik-110.350 Computer Networks (3 cr) Spring 2000 Address Resolution Protocol (ARP), Reverse ARP, Internet Protocol (IP) Professor Arto Karila Helsinki University of Technology E-mail: Arto.Karila@hut.fi

More information

IP Addressing. -Internetworking (with TCP/IP) -Classful addressing -Subnetting and Supernetting -Classless addressing

IP Addressing. -Internetworking (with TCP/IP) -Classful addressing -Subnetting and Supernetting -Classless addressing IP Addressing -Internetworking (with TCP/IP) -Classful addressing -Subnetting and Supernetting -Classless addressing Internetworking The concept of internetworking: we need to make different networks communicate

More information

Internet Architecture and Philosophy

Internet Architecture and Philosophy Internet Architecture and Philosophy Conceptually, TCP/IP provides three sets of services to the user: Application Services Reliable Transport Service Connectionless Packet Delivery Service The underlying

More information

Objectives of Lecture. Network Architecture. Protocols. Contents

Objectives of Lecture. Network Architecture. Protocols. Contents Objectives of Lecture Network Architecture Show how network architecture can be understood using a layered approach. Introduce the OSI seven layer reference model. Introduce the concepts of internetworking

More information

Unix System Administration

Unix System Administration Unix System Administration Chris Schenk Lecture 08 Tuesday Feb 13 CSCI 4113, Spring 2007 ARP Review Host A 128.138.202.50 00:0B:DB:A6:76:18 Host B 128.138.202.53 00:11:43:70:45:81 Switch Host C 128.138.202.71

More information

Network Layer: Network Layer and IP Protocol

Network Layer: Network Layer and IP Protocol 1 Network Layer: Network Layer and IP Protocol Required reading: Garcia 7.3.3, 8.1, 8.2.1 CSE 3213, Winter 2010 Instructor: N. Vlajic 2 1. Introduction 2. Router Architecture 3. Network Layer Protocols

More information

EITF25 Internet Techniques and Applications L5: Wide Area Networks (WAN) Stefan Höst

EITF25 Internet Techniques and Applications L5: Wide Area Networks (WAN) Stefan Höst EITF25 Internet Techniques and Applications L5: Wide Area Networks (WAN) Stefan Höst Data communication in reality In reality, the source and destination hosts are very seldom on the same network, for

More information

Network Layer. Introduction Datagrams and Virtual Circuits Routing Traffic Control. Data delivery from source to destination.

Network Layer. Introduction Datagrams and Virtual Circuits Routing Traffic Control. Data delivery from source to destination. Layer Introduction Datagrams and Virtual ircuits Routing Traffic ontrol Main Objective Data delivery from source to destination Node (Router) Application Presentation Session Transport Data Link Data Link

More information

SUPPORT DE COURS. Dr. Omari Mohammed Maître de Conférences Classe A Université d Adrar Courriel : omarinmt@gmail.com

SUPPORT DE COURS. Dr. Omari Mohammed Maître de Conférences Classe A Université d Adrar Courriel : omarinmt@gmail.com Dr. Omari Mohammed Maître de Conférences Classe A Université d Adrar Courriel : omarinmt@gmail.com SUPPORT DE COURS Matière : Réseaux 2 Niveau : 3 ème Année Licence en Informatique Option : Réseaux et

More information

1000 CCNA Certification Exam Preparation Questions and Answers:

1000 CCNA Certification Exam Preparation Questions and Answers: 1000 CCNA Certification Exam Preparation Questions and Answers: One Thousand Practice Questions for Passing the CCNA Exams - Pass On Your First Try 1 Copyright 2009 Notice of rights All rights reserved.

More information

This tutorial will help you in understanding IPv4 and its associated terminologies along with appropriate references and examples.

This tutorial will help you in understanding IPv4 and its associated terminologies along with appropriate references and examples. About the Tutorial Internet Protocol version 4 (IPv4) is the fourth version in the development of the Internet Protocol (IP) and the first version of the protocol to be widely deployed. IPv4 is described

More information

Network-Oriented Software Development. Course: CSc4360/CSc6360 Instructor: Dr. Beyah Sessions: M-W, 3:00 4:40pm Lecture 2

Network-Oriented Software Development. Course: CSc4360/CSc6360 Instructor: Dr. Beyah Sessions: M-W, 3:00 4:40pm Lecture 2 Network-Oriented Software Development Course: CSc4360/CSc6360 Instructor: Dr. Beyah Sessions: M-W, 3:00 4:40pm Lecture 2 Topics Layering TCP/IP Layering Internet addresses and port numbers Encapsulation

More information

Lehrstuhl für Informatik 4 Kommunikation und verteilte Systeme. Auxiliary Protocols

Lehrstuhl für Informatik 4 Kommunikation und verteilte Systeme. Auxiliary Protocols Auxiliary Protocols IP serves only for sending packets with well-known addresses. Some questions however remain open, which are handled by auxiliary protocols: Address Resolution Protocol (ARP) Reverse

More information

COMP 631: COMPUTER NETWORKS. IP Addressing. Jasleen Kaur. Fall 2014. How to Deal With Heterogeneity & Scale?

COMP 631: COMPUTER NETWORKS. IP Addressing. Jasleen Kaur. Fall 2014. How to Deal With Heterogeneity & Scale? COMP 631: COMPUTER NETWORKS IP Addressing Jasleen Kaur Fall 2014 1 How to Deal With Heterogeneity & Scale? Requirements from IP addressing: Should be globally unique Should facilitate easy mapping to link-layer

More information

2. What is the maximum value of each octet in an IP address? A. 28 B. 255 C. 256 D. None of the above

2. What is the maximum value of each octet in an IP address? A. 28 B. 255 C. 256 D. None of the above CCNA1 V3.0 Mod 10 (Ch 8) 1. How many bits are in an IP C. 64 2. What is the maximum value of each octet in an IP A. 28 55 C. 256 3. The network number plays what part in an IP A. It specifies the network

More information

Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ

Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ 1 Lecture 7: Network Layer in the Internet Reference: Chapter 5 - Computer Networks, Andrew S. Tanenbaum, 4th Edition, Prentice Hall,

More information

Indian Institute of Technology Kharagpur. TCP/IP Part I. Prof Indranil Sengupta Computer Science and Engineering Indian Institute of Technology

Indian Institute of Technology Kharagpur. TCP/IP Part I. Prof Indranil Sengupta Computer Science and Engineering Indian Institute of Technology Indian Institute of Technology Kharagpur TCP/IP Part I Prof Indranil Sengupta Computer Science and Engineering Indian Institute of Technology Kharagpur Lecture 3: TCP/IP Part I On completion, the student

More information

Internet Addresses (You should read Chapter 4 in Forouzan)

Internet Addresses (You should read Chapter 4 in Forouzan) Internet Addresses (You should read Chapter 4 in Forouzan) IP Address is 32 Bits Long Conceptually the address is the pair (NETID, HOSTID) Addresses are assigned by the internet company for assignment

More information

Network Layer, Part 1 Internet Architecture. History

Network Layer, Part 1 Internet Architecture. History Network Layer, Part 1 Internet Architecture These slides are created by Dr. Huang of George Mason University. Students registered in Dr. Huang s courses at GMU can make a single machine readable copy and

More information

Savera Tanwir. Internet Protocol

Savera Tanwir. Internet Protocol Savera Tanwir Internet Protocol The IP Protocol The IPv4 (Internet Protocol) header. IP Packet Details Header and payload Header itself has a fixed part and variable part Version IPv4, IPv5 or IPv6 IHL,

More information

Chapter 11. User Datagram Protocol (UDP)

Chapter 11. User Datagram Protocol (UDP) Chapter 11 User Datagram Protocol (UDP) The McGraw-Hill Companies, Inc., 2000 1 CONTENTS PROCESS-TO-PROCESS COMMUNICATION USER DATAGRAM CHECKSUM UDP OPERATION USE OF UDP UDP PACKAGE The McGraw-Hill Companies,

More information

DHCP, ICMP, IPv6. Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley DHCP. DHCP UDP IP Eth Phy

DHCP, ICMP, IPv6. Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley DHCP. DHCP UDP IP Eth Phy , ICMP, IPv6 UDP IP Eth Phy UDP IP Eth Phy Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley Some materials copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights

More information

Internet Protocol Address

Internet Protocol Address SFWR 4C03: Computer Networks & Computer Security Jan 17-21, 2005 Lecturer: Kartik Krishnan Lecture 7-9 Internet Protocol Address Addressing is a critical component of the internet abstraction. To give

More information

Internet Protocol Version 6 (IPv6)

Internet Protocol Version 6 (IPv6) Internet Protocol Version 6 (IPv6) Raj Jain Washington University Saint Louis, MO 63131 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse473-05/ 14-1 Overview

More information

Chapter 9. IP Secure

Chapter 9. IP Secure Chapter 9 IP Secure 1 Network architecture is usually explained as a stack of different layers. Figure 1 explains the OSI (Open System Interconnect) model stack and IP (Internet Protocol) model stack.

More information

Mobile IP. Bheemarjuna Reddy Tamma IIT Hyderabad. Source: Slides of Charlie Perkins and Geert Heijenk on Mobile IP

Mobile IP. Bheemarjuna Reddy Tamma IIT Hyderabad. Source: Slides of Charlie Perkins and Geert Heijenk on Mobile IP Mobile IP Bheemarjuna Reddy Tamma IIT Hyderabad Source: Slides of Charlie Perkins and Geert Heijenk on Mobile IP IP Refresher Mobile IP Basics 3 parts of Mobile IP: Outline Advertising Care-of Addresses

More information

Network Layer: Address Mapping, Error Reporting, and Multicasting

Network Layer: Address Mapping, Error Reporting, and Multicasting CHAPTER 21 Network Layer: Address Mapping, Error Reporting, In Chapter 20 we discussed the Internet Protocol (IP) as the main protocol at the network layer. IP was designed as a best-effort delivery protocol,

More information

13 Virtual Private Networks 13.1 Point-to-Point Protocol (PPP) 13.2 Layer 2/3/4 VPNs 13.3 Multi-Protocol Label Switching 13.4 IPsec Transport Mode

13 Virtual Private Networks 13.1 Point-to-Point Protocol (PPP) 13.2 Layer 2/3/4 VPNs 13.3 Multi-Protocol Label Switching 13.4 IPsec Transport Mode 13 Virtual Private Networks 13.1 Point-to-Point Protocol (PPP) PPP-based remote access using dial-in PPP encryption control protocol (ECP) PPP extensible authentication protocol (EAP) 13.2 Layer 2/3/4

More information

Zarząd (7 osób) F inanse (13 osób) M arketing (7 osób) S przedaż (16 osób) K adry (15 osób)

Zarząd (7 osób) F inanse (13 osób) M arketing (7 osób) S przedaż (16 osób) K adry (15 osób) QUESTION NO: 8 David, your TestKing trainee, asks you about basic characteristics of switches and hubs for network connectivity. What should you tell him? A. Switches take less time to process frames than

More information

Dynamic Host Configuration Protocol (DHCP) 02 NAT and DHCP Tópicos Avançados de Redes

Dynamic Host Configuration Protocol (DHCP) 02 NAT and DHCP Tópicos Avançados de Redes Dynamic Host Configuration Protocol (DHCP) 1 1 Dynamic Assignment of IP addresses Dynamic assignment of IP addresses is desirable for several reasons: IP addresses are assigned on-demand Avoid manual IP

More information

TCP/IP Fundamentals. OSI Seven Layer Model & Seminar Outline

TCP/IP Fundamentals. OSI Seven Layer Model & Seminar Outline OSI Seven Layer Model & Seminar Outline TCP/IP Fundamentals This seminar will present TCP/IP communications starting from Layer 2 up to Layer 4 (TCP/IP applications cover Layers 5-7) IP Addresses Data

More information

TCP/IP Network Essentials. Linux System Administration and IP Services

TCP/IP Network Essentials. Linux System Administration and IP Services TCP/IP Network Essentials Linux System Administration and IP Services Layers Complex problems can be solved using the common divide and conquer principle. In this case the internals of the Internet are

More information

Guideline for setting up a functional VPN

Guideline for setting up a functional VPN Guideline for setting up a functional VPN Why do I want a VPN? VPN by definition creates a private, trusted network across an untrusted medium. It allows you to connect offices and people from around the

More information

BCS THE CHARTERED INSTITUTE FOR IT. BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT COMPUTER NETWORKS

BCS THE CHARTERED INSTITUTE FOR IT. BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT COMPUTER NETWORKS BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT COMPUTER NETWORKS Friday 2 nd October 2015 Morning Answer any FOUR questions out of SIX. All questions carry

More information

Module 10 Subnetting Class A, B and C addresses. Solutions to the Lab Exercises 10.3.5a, 10.3.5b, 10.3.5c and 10.3.5d

Module 10 Subnetting Class A, B and C addresses. Solutions to the Lab Exercises 10.3.5a, 10.3.5b, 10.3.5c and 10.3.5d Module 10 Subnetting Class A, B and C addresses Solutions to the Lab Exercises 10.3.5a, 10.3.5b, 10.3.5c and 10.3.5d 10.3.5a Basic Subnetting Use the following information and answer the following subnet

More information

NETWORK LAYER/INTERNET PROTOCOLS

NETWORK LAYER/INTERNET PROTOCOLS CHAPTER 3 NETWORK LAYER/INTERNET PROTOCOLS You will learn about the following in this chapter: IP operation, fields and functions ICMP messages and meanings Fragmentation and reassembly of datagrams IP

More information

Computer Networks I Laboratory Exercise 1

Computer Networks I Laboratory Exercise 1 Computer Networks I Laboratory Exercise 1 The lab is divided into two parts where the first part is a basic PC network TCP/IP configuration and connection to the Internet. The second part is building a

More information