1 NETWORK By Bhupendra Ratha, Lecturer School of Library and Information Science Devi Ahilya University, Indore
2 Network A network is a group of devices (Nodes) connected by media links. A node can be a computer, printer or any other device capable of sending and receiving data generated by other nodes on the network. In other words, a group of computer and associated peripherals connected by a communication channel capable of sharing files and other resources between several users is called network.
3 Types of Network Types of Network LAN (Local Area Network) MAN (Metropolitan Area Network) WAN (Wide Area Network) It is a campus, office or organization Network extended over An entire city Network extended over entire globe
4 LAN A LAN can be as simple as two PCs and printer in ones home, office or it can be throughout a company and include voice, and video peripherals. At present LAN size is restricted to one kilometers.
5 A office LAN
6 Features of LAN LAN uses NOS (Networking Operating System), which ties all the components together and makes operations transparent to user. LANs are wholly owned by an organization. LAN is a system of interlinked personal computers. A LAN works on the principle of load sharing because the program to be executed is down loaded into the personal computer memory. LAN has a very limited geographic range normally less than 1 km.
7 Advantage of LAN It permits sharing of expensive hardware's LAN improves the productivity, because information storage, processing and retrieval and other functionally can be improved. It provide cost effective multi-user user computer environment. It provide high transmission rate to accommodate the needs of both user and equipment. Error rate is very less because in-built method of detecting and compensating for systems error is implied. It allows file/record locking.
8 Disadvantage of LAN Installation and reconfiguration always requires technical & skilled man power. Due to sharing of resources, sometime operational speed may be slow down. Insufficient knowledge of network administrator creates improper authorization and security problem. Problem of password hacking.
9 MAN A network is bigger than LAN but smaller than WAN, Multiple LANs that are connected within the same city to form a citywide network for a specific government or industry using a high speed backbone It is known as MAN.
10 MAN Indore Network operated By Public/Private company
11 Features of MAN MAN is a network designed to extend over an entire city. MAN includes different private LANs connected through cable and router or gateway. It is bigger than LAN but smaller than WAN. FDDI technology is the best suited for MAN.
12 Advantage of MAN Any company can connect all its branches existing in the same city. It is economical because sharing of costly resources for all branches of a company.
13 Disadvantage of MAN Network installation is difficult and required skilled persons. Installation cost is very much.
14 WAN A WAN is a network that connect users across large distances, often crossing the geographical boundaries of cities, states or Nations.
15 WAN Earth
16 Features of WAN In this network, computers and small networks are inter-connected without cables but with the help of telephone lines, microwave and satellite links. WAN can be implemented with the help of private networks as well as public networks. It is the very long-distance communication network.
17 Advantage of WAN WAN has no limit of area, so it is world wide network. Multi country s organizations have facility to form their global integrated network through WAN. WAN support global markets and global business. For a network database, WAN allows users all over a network to access and update a single, consistent view of data.
18 Disadvantage of WAN WAN is very big and complex network. It is slow in speed. WAN is not very much secured means not reliable. It is very costly because we have to pay every time for transferring data. Very much dependency on the third party because it is public network.
19 Difference between LAN, MAN & WAN Point of view Range Authority Cost Connectivity Device Speed Accuracy LAN 1km Personal Normal Cable media City MAN Company or Organizations Medium Cable media and Telephone lines Unlimited WAN No authority Very much Telephone lines, microwave and Satellite 0.1 to 100mbps 1 to 1mbps 1800 to 9600 bits per second Very Good Good Medium
20 Network Topology A topology defines the arrangement of nodes, cables and connectivity devices that make up the network. In other words we can say topology is the geometric arrangement of workstations and the links among them.
21 Parameters to analyses the Topology There are certain parameters, to help us select the best topology for our situation and they are; Application Complexity Performance System overhead Vulnerability Expandability
22 Application It shows in what size installation is the topology most appropriate. Complexity It shows, how technically complex is the topology?
23 Performance It shows, how much of a traffic load can the system support System overhead It shows, what is the comparative price for excess capability.
24 Vulnerability It shows, how susceptible in the topology to failure and damage. Expandability When we are ready to extend the LAN, how easily can be topology accommodate additional workstations and cover larger distances?
25 Types of Topology Topology can be divide in two basic type; 1. Physical topology 2. Logical topology
26 Physical Topology It describes the actual layout of the network transmission media, means the way of networks looks.
27 Logical Topology It describes the logical pathway a signal follows as it passes among the network nodes, means the way the data passes among the nodes.
28 The most common types of Network Bus Topology Ring Topology Star Topology Tree Topology Mesh Topology Token ring Topology Topology
29 Bus Topology Drop lines/interface units Terminator Terminator
30 Characteristics of Bus Topology A bus topology is one in which all device connect to common shared cable (backbone) through interface units/drop lines and taps. This topology is used in traditional data communication networks where the host at one end of the bus communicate with several terminals attached along its length.
31 Cont Special connector called terminator must be placed at the end of the backbone cable to prevent signals from reflecting back on the cable and causing interference. Bus configuration is known as multi-drop line.
32 Advantage of Bus Topology Installation is very easy because it is a single cable network. It uses less cabling than any other topology. Additional nodes can be connected to an existing bus network at any point along its length. It is a resilient (flexible) architecture means simple and reliable. It is very economical.
33 Disadvantage of Bus Topology Difficult reconfiguration and fault isolation. All the nodes are directly connected to central cable and nodes have to decide which uses the network first. Entire network shutdown if there is a failure in the backbone. The damage area reflects signals back in the direction of origin, creating noise in both directions.
34 Ring Topology
35 Features of Ring Topology Ring topology are wired in a circle, each node is connected to its neighbors on either side. Data signals passes around the ring in one direction. Each device incorporates a receiver and a transmitter, and serves as a repeater that passes the signal on to the next device in the ring. Ring topologies are quite rare. No routing capability is required as messages automatically travel to the next workstation on the network.
36 Advantage of Ring Topology A ring relatively easy to install and reconfigure. Less cabling involved in a ring topology comparable to that of bus and is small relative to other. Each device is linked only to its immediate neighbors so to add or delete a device requires moving only two connections. It is good for small number of workstations operating at high speeds over short distances are to be connected.
37 Disadvantage of Ring Topology A node failure causes entire network failure. A ring requires relatively complex hardware to implement. The failure of one node will affect all others has serious problem for fault diagnosis. Topology affects the access protocol.
38 Star Topology
39 Features of Star Topology It require that all devices connect to a central hub or wiring concentrator through a dedicated point to point. The hub receives signals from the other network devices and routs the signals to the proper destinations. Nodes do not have to make routing decisions, as all communications must pass through the central hub before going to their destinations. The size and capacity of the network is the depend on the central hub.
40 Advantage of Star Topology Each device needs only one link and one I/O port to connect it to any number of others. It is easy to install and reconfigure. Robustness of network means if one link fails, only that link is affected and all other links remain active. Due to the above fact, fault identification and fault isolation is very easy.
41 Disadvantage of Star Topology Cabling is required very much. Difficult to expand the network. If the central node in a star network fails the entire network is rendered inoperable Maintenance and installation problems can increase costs considerably.
42 Tree Topology Secondary hub Central/Primary node Server
43 Features of Tree Topology In tree, central hub is used to connect only secondary hubs, not with all nodes. So nodes & devices are connected through the secondary hubs. Normally the central hub of tree is an active hub so it is able to filter & regenerate the signals Secondary hub may be active or passive.
44 Advantage of Tree Topology Tree network can be easily extended because central hub has so many hubs. Network (or sub-network) can be isolated and communication can be prioritized. Due to the above fact time sensitive data will not have to wait for access to the network.
45 Disadvantage of Tree Topology Tree topology has all the disadvantages of star topology. The subsection has dependence on the root section. Bigger branches slow down the speed of network.
46 Mesh Topology
47 Features of Mesh Topology Every device has a dedicated point to point link to every other device. Mesh is really a hybrid model representing an all channels topology. Every device on the network must have n-1 input/output ports.
48 Advantage of Mesh Topology It is very much fault tolerance capacity. Privacy or security is very high, every message sent travels along a dedicated line only the intended recipient sees it.
49 Disadvantage of Mesh Topology Installation & reconfiguration is very difficult. Extra workload to network administrator. It requires very much cabling & I/O ports. Extra wiring can be greater than the available space can accommodate. It is the most expansive network.
50 Token Ring Topology
51 Features of Token Ring Topology In this topology, wired in a circular format but all the node connected by the drop lines and T- shape tokens. In this topology all the nodes have only receiver and transmitter not a repeater.
52 Advantage of Token Ring Topology A node failure causes entire network are not failure. No problems in fault diagnosis. Privacy and accuracy in data transmission.
53 Disadvantage of Token Ring Topology A token ring is difficult to install and reconfigure. Cabling is required very much. It does not allow direct traffic between devices.
Local Area Network By Bhupendra Ratha, Lecturer School of Library and Information Science Devi Ahilya University, Indore Email: firstname.lastname@example.org Local Area Network LANs connect computers and peripheral
Volume 1, Issue 2, July 2013 International Journal of Advance Research in Computer Science and Management Studies Research Paper Available online at: www.ijarcsms.com Network Structure or Topology Kartik
Future Stars Grade X Manual Chapter 1 Networking and Telecommunication 1. Answer the following questions. a. What is telecommunication? Ans: The transfer of information at a far distance is known as telecommunication.
2 Computer Network and Communication 2.1 INTRODUCTION As we all know, the advances in Information technology revolutionized almost every aspect of our life. Education, industry, banking, researches and
Computer Networks Lecture 06 Connecting Networks Kuang-hua Chen Department of Library and Information Science National Taiwan University Local Area Networks (LAN) 5 kilometer IEEE 802.3 Ethernet IEEE 802.4
Network Topologies LANs and WANs - Geographical coverage LANs A single geographical location, such as office building, school, etc Typically High speed and cheaper. WANs Spans more than one geographical
What You Will Learn About Computers Are Your Future Chapter 8 Networks: Communicating and Sharing Resources Basic networking concepts Advantages and disadvantages of networks Peer-to-peer and client/server
ET225 Networking Concepts Chapter 1 What is a Computer Network? Objectives Identify the advantages of connecting computers and devices on a network. Recognize common network components in a lab setting.
Lecture 6 Types of Computer Networks and their Topologies Three important groups of computer networks: LAN, MAN, WAN LAN (Local Area Networks) 10/28/2008 Vasile Dadarlat - Computer Networks 1 MAN (Metropolitan
Computer Networks Contents Introduction Basic Elements of communication systemnetwork Topologies Network types Introduction A Computer network is a network of computers that are geographically distributed,
Computer Networking: A Survey M. Benaiah Deva Kumar and B. Deepa, 1 Scholar, 2 Assistant Professor, IT Department, Sri Krishna College of Arts and Science College, Coimbatore, India. Abstract- Computer
1 Data communication principles, types and working principles of modems, Network principles, OSI model, functions of data link layer and network layer, networking components, communication protocols- X
Network Design Yiannos Mylonas Physical Topologies There are two parts to the topology definition: the physical topology, which is the actual layout of the wire (media), and the logical topology, which
1 CHAPTER ONE Introduction to Networking Objectives 2.3 Identify common physical network topologies. Star. Mesh. Bus. Ring. Point to point. Point to multipoint. Hybrid 2.7 Explain common logical network
CN1047 INTRODUCTION TO COMPUTER NETWORKING CHAPTER 1 BASIC CONCEPTS OF NETWORK DEFINTION & APPLICATIONS DEFINTION: A computer network is defined as the interconnection of two or more computers. It is done
Computer Networking Type A: Very Short Answer Questions 1. Define a network. What is its need? Ans: A computer network is a system in which computers are connected to share information and resources. Computer
524 Computer Networks Section 1: Introduction to Course Dr. E.C. Kulasekere Sri Lanka Institute of Information Technology - 2005 Course Outline The Aim The course is design to establish the terminology
Chapter 8: Computer Networking AIMS The aim of this chapter is to give a brief introduction to computer networking. OBJECTIVES At the end of this chapter you should be able to: Explain the following terms:
Computer Networks A group of two or more computer systems linked together. There are many [types] of computer networks: Peer To Peer (workgroups) The computers are connected by a network, however, there
ADSL or Asymmetric Digital Subscriber Line Backbone Bandwidth Bit Commonly called DSL. Technology and equipment that allow high-speed communication across standard copper telephone wires. This can include
COMPUTERS ARE YOUR FUTURE CHAPTER 7 NETWORKS: COMMUNICATING AND SHARING RESOURCES Answers to End-of-Chapter Questions Matching g 1. router o 2. node i 3. ring l 4. hub c 5. star n 6. backbone b 7. latency
Local Area Networks Guest Instructor Elaine Wong Elaine_06_I-1 Outline Introduction to Local Area Networks (LANs) Network architecture Geographical area LAN applications LAN Technologies Ethernet Fiber
Introduction to Metropolitan Area Networks and Wide Area Networks Chapter 9 Learning Objectives After reading this chapter, you should be able to: Distinguish local area networks, metropolitan area networks,
MANAGEMENT INFORMATION SYSTEMS 8/E Raymond McLeod, Jr. and George Schell Chapter 10 Data Communications Copyright 2001 Prentice-Hall, Inc. 10-1 Objectives Understand data communication basics. Know the
System Development and Life-Cycle Management (SDLCM) Methodology Subject Type Standard Approval CISSCO Program Director A. PURPOSE This standard specifies the format and conventions to be used in developing
NETWORKING TECHNOLOGIES (October 19, 2015) BUS3500 - Abdou Illia, Fall 2015 1 LEARNING GOALS Identify the major hardware components in networks. Identify and explain the various types of computer networks.
Uses of a network A network is a way to connect computers so that they can communicate, exchange information and share resources in real time. Networks enable multiple users to access shared data and programs
CHAPTER 1 Network Fundamentals 1 Exam objectives in this chapter What Is a Network? Logical Network Topologies Physical Network Topologies Network Types WHAT IS A NETWORK? The basic concept of networking
Networks Networking is all about sharing information and resources. Computers connected to a network can avail of many facilities not available to standalone computers: Share a printer or a plotter among
July 2013 Understanding Device Level Connection Topologies Author: Advantech E-mail: email@example.com July 2013 Even ten years ago, most factory floor sensors were connected directly to a PLC or other
Local Area What s a LAN? A transmission system, usually private owned, very speedy and secure, covering a geographical area in the range of kilometres, comprising a shared transmission medium and a set
Review questions 1 Which network type is a specifically designed configuration of computers and other devices located within a confined area? A Peer-to-peer network B Local area network C Client/server
Technology in Action Alan Evans Kendall Martin Mary Anne Poatsy Eleventh Edition Technology in Action Chapter 10 Behind the Scenes: Networking and Security in the Business World 2 Chapter Topics Client/Server
Mathatma Gandhi University BSc Computer Science IV th semester BCS 402 Computer Network &Internet MULTIPLE CHOICE QUESTIONS 1. The computer network is A) Network computer with cable B) Network computer
Ethernet dominant LAN technology: cheap -- $20 for 100Mbs! first widely used LAN technology Simpler, cheaper than token rings and ATM Kept up with speed race: 10, 100, 1000 Mbps Metcalfe s Etheret sketch
Overview Dipl.-Ing. Peter Schrotter Institute of Communication Networks and Satellite Communications Graz University of Technology, Austria Fundamentals of Communicating over the Network Application Layer
Discovering Computers 2008 Chapter 9 Communications and Networks Chapter 9 Objectives Discuss the the components required for for successful communications Identify various sending and receiving devices
Level 2 Routing: LAN Bridges and Switches Norman Matloff University of California at Davis c 2001, N. Matloff September 6, 2001 1 Overview In a large LAN with consistently heavy traffic, it may make sense
Introduction to Computer Networks and Data Communications Chapter 1 Learning Objectives After reading this chapter, you should be able to: Define the basic terminology of computer networks Recognize the
Network+ Guide to Networks 6 th Edition Chapter 7 Wide Area Networks Objectives Identify a variety of uses for WANs Explain different WAN topologies, including their advantages and disadvantages Compare
Overview of Routing between Virtual LANs This chapter provides an overview of virtual LANs (VLANs). It describes the encapsulation protocols used for routing between VLANs and provides some basic information
Lecture 1 An Introduction to Networking Chapter 1, pages 1-22 Dave Novak BSAD 146, Introduction to Networking School of Business Administration University of Vermont Lecture Overview Brief introduction
Network Fundamentals Computer Literacy BASICS: A Comprehensive Guide to IC 3, 3 rd Edition 1 Objectives Describe a network. Explain the benefits of a network. Identify the risks of network computing. Describe
5 Data Communication and Networking 5.1 Introduction Today computer is available in many offices and homes and therefore there is a need to share data and programs among various computers. With the advancement
Introduction Computer Network. Interconnected collection of autonomous computers that are able to exchange information No master/slave relationship between the computers in the network Data Communications.
Using High Availability Technologies Lesson 12 Skills Matrix Technology Skill Objective Domain Objective # Using Virtualization Configure Windows Server Hyper-V and virtual machines 1.3 What Is High Availability?
3 Internet and Services 3.1 INTRODUCTION The Internet began way back in 1969 when it was called ARPANet (Advanced Research Project Agency Network) and was used exclusively for military purposes. It soon
CMPT 165: The Internet, Part 3 Tamara Smyth, firstname.lastname@example.org School of Computing Science, Simon Fraser University September 15, 2011 1 Basic Communication Technology Packet Switching (sharing a tranmission
Communication Networks MAP-TELE 2011/12 José Ruela Network basic mechanisms Introduction to Communications Networks Communications networks Communications networks are used to transport information (data)
Yatindra Nath Singh Assistant Professor Electrical Engineering Department Indian Institute of Technology, Kanpur Email: email@example.com http://home.iitk.ac.in/~ynsingh 1 What are optical network? Telecomm
Digital Designer s Guide Application Note AN0404A Revision B About this application note Related reference materials Required software This application note describes the principles behind planning a BACnet
Introduction If you re planning to use eivf soon, you may want to install a computer network to improve access to your eivf Provider Portal from any PC in your office. This paper provides information you
JR RICHARDSON Engineering for the Masses Jr.firstname.lastname@example.org Leveraging Embedded Fiber Optic Infrastructures for Scalable Broadband Services Preface When telecommunications companies sell broadband access,
CHAPTER 6 DESIGNING A NETWORK TOPOLOGY Expected Outcomes Able to identify terminology that will help student discuss technical goals with customer. Able to introduce a checklist that can be used to determine
DATA COMMUNICATION AND NETWORKS 1. Define the term Computer Networks. A Computer network is a number if computers interconnected by one or more transmission paths. The transmission path often is the telephone
WIRELESS ETHERNET (IEEE 803.11) Wireless LANs form a very small percentage of LANs in operation today, but their use is growing rapidly. Wireless LANs transmit data through the air using radio or infrared
Optimizing Enterprise Network Bandwidth For Security Applications Improving Performance Using Antaira s Management Features By: Brian Roth, Product Marketing Engineer April 1, 2014 April 2014 Optimizing
VPN Date: 4/15/2004 By: Heena Patel Email:email@example.com What is VPN? A VPN (virtual private network) is a private data network that uses public telecommunicating infrastructure (Internet), maintaining
Helsinki University of Technology S-72.333 Postgraduate Seminar on Radio Communications Controlled Random Access Methods Er Liu firstname.lastname@example.org Communications Laboratory 09.03.2004 Content of Presentation
Cisco Network Performance Evaluation Using Packet Tracer doi: 10.17932/ IAU.IJEMME.m.21460604.2015.5/1.905-911 Muhammet Emin KAMİLOĞLU 1 Abstract In this study, a wide area network designed and simulated.
New York University, Leonard N. Stern School of Business C20.0001 Information Systems for Managers Fall 1999 Networking Fundamentals A network comprises two or more computers that have been connected in
Page 1 of 5 Title Demonstrate an understanding of local and wide area computer networks Level 7 Credits 10 Purpose People credited with this unit standard are able to: describe network types and standards;
Component 4: Introduction to Information and Computer Science Unit 7: Networks & Networking Lecture 1 This material was developed by Oregon Health & Science University, funded by the Department of Health
Network System Design Lesson Unit 1: INTRODUCTION TO NETWORK DESIGN Assignment Customer Needs and Goals Identify the purpose and parts of a good customer needs report. Gather information to identify network
CAMPUS NETWORK SECURITY AND MANAGEMENT 1 S. Sudharsan, 2 M. Naga Srinivas, 3 G. Sai Shabareesh, P.Kiran Rao 1 Department of Computer science 2 Department of Computer science 3 Department of Computer science
Highly Available Mobile Services Infrastructure Using Oracle Berkeley DB Executive Summary Oracle Berkeley DB is used in a wide variety of carrier-grade mobile infrastructure systems. Berkeley DB provides
FIBER OPTIC APPLICATION IN A PROFIBUS NETWORK Field busses are industrial control systems using Programmable Logic lers (PLC) to control and manage field devices found in industrial environments. The communication
NATIONAL OPEN UNIVERSITY OF NIGERIA SCHOOL OF SCIENCE AND TECHNOLOGY COURSE CODE: CIT 465 COURSE CODE: Network Administration GUIDE COURSE Course Code CIT 465 Course Title Course Developer/Writer Programme
1 1 Chapter 15: Distributed Structures Topology Network Types Operating System Concepts 15.1 Topology Sites in the system can be physically connected in a variety of ways; they are compared with respect
ELEC3030 Computer Networks Professor Sheng Chen: Building 86, Room 1021 E-mail: email@example.com Download lecture slides from: http://www.ecs.soton.ac.uk/ sqc/el336/ or get them from Course Office (ECS
2. Basic Concepts Contents 2 Basic Concepts a. Link configuration b. Topology c. Transmission mode d. Classes of networks 1 a. Link Configuration Data links A direct data link is one that establishes a
www.eazynotes.com Maninder Kaur [Page No. 1] Introduction to Networks Short Answer Type Questions Q-1. Which Technologies of this age had led to the emergence of computer network? Ans: The technologies
Overview: Network Introduction what is a computer network? digital transmission components of a computer network network hardware network software What is a computer network? an interconnected collection
Overview of Network Hardware and Software CS158a Chris Pollett Jan 29, 2007. Outline Scales of Networks Protocol Hierarchies Scales of Networks Last day, we talked about broadcast versus point-to-point
52-20-40 DATA COMMUNICATIONS MANAGEMENT UPPER LAYER SWITCHING Gilbert Held INSIDE Upper Layer Operations; Address Translation; Layer 3 Switching; Layer 4 Switching OVERVIEW The first series of LAN switches
Chapter 4 Connecting to the Internet through an ISP 1. According to Cisco what two things are essential to gaining access to the internet? a. ISPs are essential to gaining access to the Internet. b. No
Lecture 7: Distributed Operating Systems A Distributed System 7.2 Resource sharing Motivation sharing and printing files at remote sites processing information in a distributed database using remote specialized
1060 Implementation of Virtual Local Area Network using network simulator Sarah Yahia Ali Department of Computer Engineering Techniques, Dijlah University College, Iraq ABSTRACT Large corporate environments,
(CTNP) Syllabus Copyright This is intellectual property of ACTA S.A. and it is protected by Greek and European legislation concerning copyright. The creation of a copy of part, or of the whole, without
COMP 730 (242) Class Notes Section 10: Organization of Operating Systems 1 Organization of Operating Systems We have studied in detail the organization of Xinu. Naturally, this organization is far from
Network Infrastructure or building computer networks more complex than e.g. a short bus, some additional components are needed. They can be arranged hierarchically regarding their functionality: Repeater
Page 1 of 8 Computer Networking Networks 9.1 Local area network A local area network (LAN) is a network that connects computers and devices in a limited geographical area such as a home, school, office
Capacity Constrained Smart Grid Design Smart Devices Smart Networks Smart Planning EDX Wireless Tel: +1-541-345-0019 I Fax: +1-541-345-8145 I firstname.lastname@example.org I www.edx.com Mark Chapman and Greg Leon EDX Wireless