Networks 2. Gabriela Ochoa University of Stirling CSCU9B1 Essential Skills for the Information Age. Content

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Networks 2. Gabriela Ochoa. 2014 University of Stirling CSCU9B1 Essential Skills for the Information Age. Content"

Transcription

1 Networks 2 Gabriela Ochoa Lecture Networks 2/Slide 1 Content How is Internet connected? Internet backbone Internet service providers (ISP) How to connect a home computer to the Internet? How do networks work? Packet switching Open systems Protocols BBC WebWise: Introductory video: What is Internet? Lecture Networks 2/Slide 2 Page 1 1

2 How is Internet connected? Internet backbone Internet service providers (ISP) How to connect a home computer to the Internet? 1. Phone modem 2. Digital subscriber line (DSL) 3. Cable modem Lecture Networks 2/Slide 3 The Internet backbone A set of high capacity data routes that carry Internet traffic (high data transfer rates: Mbps, Gbps) Analogy with human backbone or spine Provided by various companies (per regions) such as US: AT&, Verizon, NTT, etc. UK: British Telecom China: China Telecom, China Unicom Germany: Deutsche Telekom AG Use special optical cables Note: There is no really central network, Internet is redundant Lecture Networks 2/Slide 4 Page 2 2

3 Kbps, Mbps, Gbps The data rate of a computer network connection is normally measured in units of bits per second (bps) Network equipment makers rate their products using related, larger units of Kbps, Mbps and Gbps. Kilobit per second (Kbps): 1000 bps Megabit per second (Mbps): 1000 Kbps or one million bps ( bps) Gigabit per second (Gbps): 1000 Mbps or one million Kbps or one billion bps ( bps) What is a bit? Basic unit of information in computing and digital communications One of two values (0,1) physically implemented with a two-state device Contraction of binary digit Lecture Networks 2/Slide 5 The internet backbone: BT Core topology of the BT IP Network within Europe, and its connectivity to the USA. BT also offers IP services globally through strategic supply arrangements. Lecture Networks 2/Slide 6 Page 3 3

4 Internet backbone: NTT network Ranked among the top 5 networks worldwide World s largest transpacific network Lecture Networks 2/Slide 7 Internet service providers (ISP) Company or organization that offers users access to the Internet and related services. Most ISP are telephone companies or other telecommunications providers ISPs connect directly to the Internet backbone, or connect to larger ISPs with a connection to the backbone Top ISP in the UK: Lecture Networks 2/Slide 8 Page 4 4

5 How to connect a home computer to Internet? Three main technologies available to connect a home computer to the Internet 1. Phone modem converts computer data into an analog audio signal for transfer over a telephone line, and then a modem at the destination converts it back again into data 2. Digital subscriber line (DSL) uses regular copper phone lines to transfer digital data to and from the phone company s central office 3. Cable modem uses the same line that your cable TV signals come in on to transfer the data back and forth Lecture Networks 2/Slide 9 Phone modem Use the telephone system, which is already in place Modem: stands modulator/demodulator A phone modem a converts computer data into an analog audio signal for transfer over the telephone line, a modem at the end converts it back into data again Establish a telephone connection between your home computer and a computer that is permanently connected to Internet ISP provides the right to call to one or several (preferably local) computers set for this purpose Data transfer limited to that of analogue voice communication: 64 kbps Lecture Networks 2/Slide 10 Page 5 5

6 Digital subscriber line (DSL) Still uses the telephone system (copper lines) without preventing preventing normal use of the telephone line BUT, treats data as digital rather than analogue High speed connection Most telephone companies today offer DSL The telephone company, may become your ISP, or sells the use of its lines to a third-party ISP. No need to dial in. An active connection is maintained between your home an a computer at the ISP. Your home should be close to the DSL central office. The farther away you get from the central office, the weaker the signal becomes. What is the difference between analogue and digital signals? Lecture Networks 2/Slide 11 Cable modem Many people get their TV signal from cable television CATV provides a clearer picture and more channels CATV can also provide a high connection to the Internet Uses either Coaxial cables (radio frequency signals) Fibre-optic cables (light pulses) All nodes for cable subscribers in a neighbourhood connect to a cable company's central office, known as the "head end. The cable company then connects to the Internet using either: fibre optic cable or digital satellite and microwave transmission Like DSL, cable provides a continuous connection with an ISP Optical fibre cable Coaxial Cable Lecture Networks 2/Slide 12 Page 6 6

7 Broadband A connection in which transfer speeds are faster than 1 Mbps (up to 100 Mbps or more) DSL connections and cable modems are broadband connections Debate between the DSL and cable modem communities continues, to see have the larger market share The speed for downloads (getting data from the Internet to your home computer) may not be the same as uploads (sending data from your home computer to the Internet) Most traffic for home users consists of downloads. Therefore, companies devote more speed to downloads. Lecture Networks 2/Slide 13 Computer network hierarchy POP (Point of Presence) : place for local users to access to the organization network (e.g. through a local phone or dedicated line) NAP (Network Access Point): centralized point where Internet traffic is exchanged or shared. Serve to tie ISPs Lecture Networks 2/Slide 14 Page 7 7

8 How do networks work? Communication requires that devices agree on the format of the data Software is required to organise and structure users data Protocol: set of rules defining format of the data. Prepare information to be transmitted via hardware (encoding/decoding) Users Software Protocol software virtual links Users Software Protocol software Hardware physical link Hardware Lecture Networks 2/Slide 15 Packet switching Messages are divided into fixed-sized, numbered packets; packets are individually routed to their destination, then reassembled Packet: A unit of data sent across a network Router: A network device that directs a packet between networks toward its final destination Lecture Networks 2/Slide 16 Page 8 8

9 A logical progression... Open systems Proprietary system A system that uses technologies kept private by a particular commercial vendor Interoperability The ability of software and hardware on multiple machines and from multiple commercial vendors to communicate Open systems Systems based on a common model of network architecture and a suite of protocols used in its implementation 17 Lecture Networks 2/Slide 17 Open systems Open Systems Interconnection Reference Model A seven-layer logical break down of network interaction to facilitate communication standards Each layer deals with a particular aspect of network communication The layers of the OSI Reference Model Lecture Networks 2/Slide 18 Page 9 9

10 Summary How is Internet connected? Backbone, Internet providers How to connect a home computer to Internet How do networks work? Packet switching Open systems and protocols Lecture Networks 2/Slide 19 Networks - References N. Dell & J. Lewis, Computer Science Illuminated, Chapters H.L Capron & J.A. Jhonson, Computers Tools for an information Age, Chapters 7-8 How Stuff Works - Internet Infrastructure:http://computer.howstuffworks.com/internetinfrastructure.htm Lecture Networks 2/Slide 20 Page 10 10

ADSL or Asymmetric Digital Subscriber Line. Backbone. Bandwidth. Bit. Bits Per Second or bps

ADSL or Asymmetric Digital Subscriber Line. Backbone. Bandwidth. Bit. Bits Per Second or bps 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

More information

Chapter 9A. Network Definition. The Uses of a Network. Network Basics

Chapter 9A. Network Definition. The Uses of a Network. Network Basics Chapter 9A Network Basics 1 Network Definition Set of technologies that connects computers Allows communication and collaboration between users 2 The Uses of a Network Simultaneous access to data Data

More information

The part of the network that connects customers to the exchange, sometimes called the local loop or the last mile.

The part of the network that connects customers to the exchange, sometimes called the local loop or the last mile. Glossary of broadband terms 3G: Refers to the third generation of mobile phone technology following on from 2G. 3G allows for faster access to the internet and allows services including video calls and

More information

C20.0001 Information Systems for Managers Fall 1999

C20.0001 Information Systems for Managers Fall 1999 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

More information

ADSL BROADBAND BASICS FOR THE DOMESTIC USER. The Main Limitations of ADSL Broadband are as follows.

ADSL BROADBAND BASICS FOR THE DOMESTIC USER. The Main Limitations of ADSL Broadband are as follows. ADSL BROADBAND BASICS FOR THE DOMESTIC USER AS NOTHING MAN MADE IS PERFECT, ADSL IS NOT AN EXCEPTION. The Main Limitations of ADSL Broadband are as follows. 1. ADSL is not a Guaranteed Bandwidth Service.

More information

Introduction to computer networks and Cloud Computing

Introduction to computer networks and Cloud Computing Introduction to computer networks and Cloud Computing Aniel Nieves-González Fall 2015 Computer Netwoks A computer network is a set of independent computer systems that are connected by a communication

More information

Telecommunications, Networks, and Wireless Computing

Telecommunications, Networks, and Wireless Computing Objectives Telecommunications, Networks, and Wireless Computing 1. What are the features of a contemporary corporate telecommunications system? On what major technology developments are they based? 2.

More information

Chapter 7: Computer Networks, the Internet, and the World Wide Web. Invitation to Computer Science, C++ Version, Third Edition

Chapter 7: Computer Networks, the Internet, and the World Wide Web. Invitation to Computer Science, C++ Version, Third Edition Chapter 7: Computer Networks, the Internet, and the World Wide Web Invitation to Computer Science, C++ Version, Third Edition Objectives In this chapter, you will learn about: Basic networking concepts

More information

Technical Glossary from Frontier

Technical Glossary from Frontier Technical Glossary from Frontier A Analogue Lines: Single Analogue lines are generally usually used for faxes, single phone lines, modems, alarm lines or PDQ machines and are generally not connected to

More information

Wireless Links - Wireless communication relies on radio signals or infrared signals for transmitting data.

Wireless Links - Wireless communication relies on radio signals or infrared signals for transmitting data. 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

More information

INTERNET CONNECTIVITY

INTERNET CONNECTIVITY INTERNET CONNECTIVITY http://www.tutorialspoint.com/internet_technologies/internet_connectivity.htm Copyright tutorialspoint.com Here in this tutorial, we will discuss how to connect to internet i.e. internet

More information

Chapter 5. Data Communication And Internet Technology

Chapter 5. Data Communication And Internet Technology Chapter 5 Data Communication And Internet Technology Purpose Understand the fundamental networking concepts Agenda Network Concepts Communication Protocol TCP/IP-OSI Architecture Network Types LAN WAN

More information

Economic Research & Analysis. CostQuest Associates (CQA) Bandwidth Assessment Tool Glossary of Terms: Words & Acronyms June 2014

Economic Research & Analysis. CostQuest Associates (CQA) Bandwidth Assessment Tool Glossary of Terms: Words & Acronyms June 2014 CostQuest Associates (CQA) Economic Research & Analysis Bandwidth Assessment Tool Glossary of Terms: Words & Acronyms June 2014 CostQuest Associates (CQA) Economic Research & Analysis For further information

More information

TAXONOMY OF TELECOM TERMS

TAXONOMY OF TELECOM TERMS TAXONOMY OF TELECOM TERMS Prepared by TUFF Ltd This short taxonomy is designed to describe the various terms used in today s telecommunications industry. It is not intended to be all embracing but to describe

More information

Think! Think! Data communications. Long-Distance. Modems: to analog and back. Transmission Media. The last mile is the hardest for digital information

Think! Think! Data communications. Long-Distance. Modems: to analog and back. Transmission Media. The last mile is the hardest for digital information Data communications Think! Think!?? What makes it possible to communicate from point A to point B?? Long-Distance Transmission Media If you place a call outside the local transport area, an interchange

More information

Internet Public Network

Internet Public Network Internet Public Network Bandwidth Data rate measured in bits (not bytes) per seconds Kbps (Kilobits per seconds) 125 chars/sec Mbps (Megabits per seconds) 1,250 chars/sec Gbps (Gigabits per seconds) 12,500

More information

Chapter 9. Communications and Networks. McGraw-Hill/Irwin. Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved.

Chapter 9. Communications and Networks. McGraw-Hill/Irwin. Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 9 Communications and Networks McGraw-Hill/Irwin Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved. Competencies (Page 1 of 2) Discuss connectivity, the wireless revolution,

More information

Community Forum Agenda October 2012

Community Forum Agenda October 2012 Community Forum Agenda October 2012 Topic Welcome CEKC/WSUE LTPT Project Scope Forums Survey Data Results LTPT Next Steps Broadband 101/Map Q&A Websites Mapping Survey Complete Survey Close/Next Steps

More information

3.1 TELECOMMUNICATIONS, NETWORKS AND THE INTERNET

3.1 TELECOMMUNICATIONS, NETWORKS AND THE INTERNET 3.1 TELECOMMUNICATIONS, NETWORKS AND THE INTERNET The Business Value of Telecommunications and Networking Business value impacts of the telecommunications and Networking are: Declining transaction costs

More information

Data Transmission. from one person or place to another. person or place to another of passing something

Data Transmission. from one person or place to another. person or place to another of passing something Data Transmission Transmission: the process of passing something from one person or place to another of passing something from one person or place to another Data Transmission Main types of Transmission

More information

Chapter 4 Connecting to the Internet through an ISP

Chapter 4 Connecting to the Internet through an ISP 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

More information

Getting Broadband. FCC Consumer Facts. What Is Broadband?

Getting Broadband. FCC Consumer Facts. What Is Broadband? Getting Broadband FCC Consumer Facts What Is Broadband? Broadband or high-speed Internet access allows users to access the Internet and Internetrelated services at significantly higher speeds than those

More information

CTS2134 Introduction to Networking. Module 07: Wide Area Networks

CTS2134 Introduction to Networking. Module 07: Wide Area Networks CTS2134 Introduction to Networking Module 07: Wide Area Networks WAN cloud Central Office (CO) Local loop WAN components Demarcation point (demarc) Consumer Premises Equipment (CPE) Channel Service Unit/Data

More information

Network+ Guide to Networks, Fourth Edition. Chapter 7 WANs, Internet Access, and Remote Connectivity. Objectives

Network+ Guide to Networks, Fourth Edition. Chapter 7 WANs, Internet Access, and Remote Connectivity. Objectives Network+ Guide to Networks, Fourth Edition Chapter 7 WANs, Internet Access, and Remote Connectivity Objectives Identify a variety of uses for WANs Explain different WAN topologies, including their advantages

More information

R2. The word protocol is often used to describe diplomatic relations. How does Wikipedia describe diplomatic protocol?

R2. The word protocol is often used to describe diplomatic relations. How does Wikipedia describe diplomatic protocol? Chapter 1 Review Questions R1. What is the difference between a host and an end system? List several different types of end systems. Is a Web server an end system? 1. There is no difference. Throughout

More information

Broadband Definitions and Acronyms

Broadband Definitions and Acronyms The New Mexico Broadband Program Broadband Definitions and Acronyms Version 1, April 2013 Prepared for: The New Mexico Broadband Program NM Department of Information Technology http://www.doit.state.nm.us/broadband/

More information

Appendix A: Basic network architecture

Appendix A: Basic network architecture Appendix A: Basic network architecture TELECOMMUNICATIONS LOCAL ACCESS NETWORKS Traditionally, telecommunications networks are classified as either fixed or mobile, based on the degree of mobility afforded

More information

WAN Technology. Heng Sovannarith heng_sovannarith@yahoo.com

WAN Technology. Heng Sovannarith heng_sovannarith@yahoo.com WAN Technology Heng Sovannarith heng_sovannarith@yahoo.com Introduction A WAN is a data communications network that covers a relatively broad geographic area and often uses transmission facilities provided

More information

Introduction Page 2. Understanding Bandwidth Units Page 3. Internet Bandwidth V/s Download Speed Page 4. Optimum Utilization of Bandwidth Page 8

Introduction Page 2. Understanding Bandwidth Units Page 3. Internet Bandwidth V/s Download Speed Page 4. Optimum Utilization of Bandwidth Page 8 INDEX Introduction Page 2 Understanding Bandwidth Units Page 3 Internet Bandwidth V/s Download Speed Page 4 Factors Affecting Download Speed Page 5-7 Optimum Utilization of Bandwidth Page 8 Conclusion

More information

Chapter 2 - The TCP/IP and OSI Networking Models

Chapter 2 - The TCP/IP and OSI Networking Models Chapter 2 - The TCP/IP and OSI Networking Models TCP/IP : Transmission Control Protocol/Internet Protocol OSI : Open System Interconnection RFC Request for Comments TCP/IP Architecture Layers Application

More information

Chapter 9 Communications and Networks

Chapter 9 Communications and Networks Chapter 9 Communications and Networks Chapter 9 Objectives Discuss the components required for successful communications Identify various sending and receiving devices Explain the purpose of communications

More information

8 Wide Area Network (WAN)

8 Wide Area Network (WAN) Wide Area Network (WAN).1 Introduction Objectives.2 Why need a WAN?.3 Switching Techniques.3.1 Circuit switching network.3.2 Packet switching Network.3.2.1 How Packet Switching Network Works?.3.2.2 Datagram

More information

Network+ Guide to Networks 6 th Edition. Chapter 7 Wide Area Networks

Network+ Guide to Networks 6 th Edition. Chapter 7 Wide Area Networks 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

More information

Glossary of Telco Terms

Glossary of Telco Terms Glossary of Telco Terms Access Generally refers to the connection between your business and the public phone network, or between your business and another dedicated location. A large portion of your business

More information

This course has been retired. View the schedule of current <a href=http://www.ptr.co.uk/networkingcourses.htm>networking

This course has been retired. View the schedule of current <a href=http://www.ptr.co.uk/networkingcourses.htm>networking Introduction to Data Communications & Networking Course Description: This course has been retired. View the schedule of current networking Courses

More information

(Refer Slide Time: 2:10)

(Refer Slide Time: 2:10) Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture-12 Multiplexer Applications-1 Hello and welcome to today s lecture on multiplexer

More information

Free wifi in the TRA halls and faster mobile access

Free wifi in the TRA halls and faster mobile access Free wifi in the TRA halls and faster mobile access Glossary of Telecommunications terms 2G 2G is a digital mobile communications standard allowing for voice calls and limited data transmission. 2G refers

More information

Computer Networks. Definition of LAN. Connection of Network. Key Points of LAN. Lecture 06 Connecting Networks

Computer Networks. Definition of LAN. Connection of Network. Key Points of LAN. Lecture 06 Connecting Networks 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

More information

Cable subscribers are connected directly to high speed lines while ADSL subscribers are connected directly to medium speed lines

Cable subscribers are connected directly to high speed lines while ADSL subscribers are connected directly to medium speed lines ADSL vs Cable Cable subscribers are connected directly to high speed lines while ADSL subscribers are connected directly to medium speed lines Cable subscribers share the line connecting them to neighbourhood

More information

Overview of WAN Connections Module 1

Overview of WAN Connections Module 1 Overview of WAN Connections Module 1 Objectives This module introduces the basic elements of WAN connections and describes the role each element plays in creating that connection. After completing this

More information

Connection Services. Hakim S. ADICHE, MSc

Connection Services. Hakim S. ADICHE, MSc Connection Services Hakim S. ADICHE, MSc adiche@ccse.kfupm.edu.sa Department of Computer Engineering King Fahd University of Petroleum and Minerals Dhahran, Saudi Arabia Connection Services Different connectivity

More information

Computer Network. Interconnected collection of autonomous computers that are able to exchange information

Computer Network. Interconnected collection of autonomous computers that are able to exchange information 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.

More information

CSCI 491-01 Topics: Internet Programming Fall 2008

CSCI 491-01 Topics: Internet Programming Fall 2008 CSCI 491-01 Topics: Internet Programming Fall 2008 Introduction Derek Leonard Hendrix College September 3, 2008 Original slides copyright 1996-2007 J.F Kurose and K.W. Ross 1 Chapter 1: Introduction Our

More information

CCNA Discovery Chapter Four

CCNA Discovery Chapter Four CCNA Discovery Chapter Four By Chief Eng. Amna Ahmed Institute of Telecommunication amna_ahmed28@yahoo.com Modified by Vincenzo Bruno Hacklab Cosenza Chapter 4 Explain what the internet is Every day millions

More information

Central Superfast Broadband Project Frequently Asked Questions

Central Superfast Broadband Project Frequently Asked Questions Central Superfast Broadband Project Frequently Asked Questions What is the Central Superfast Broadband Project? The Central Superfast Broadband Project is a partnership between Central Bedfordshire Council,

More information

EECC694 - Shaaban. Transmission Channel

EECC694 - Shaaban. Transmission Channel The Physical Layer: Data Transmission Basics Encode data as energy at the data (information) source and transmit the encoded energy using transmitter hardware: Possible Energy Forms: Electrical, light,

More information

Introduction cont. Some Structure in the Chaos. Packet switching versus circuit switching. Access networks and physical media

Introduction cont. Some Structure in the Chaos. Packet switching versus circuit switching. Access networks and physical media Introduction cont. Some Structure in the Chaos Lecture goal: get context, overview, feel of ing more depth, detail later in course approach: o descriptive o use Internet as example Overview: access net,

More information

Introduction to ADSL. NEXTEP Broadband White Paper. Broadband Networks Group. A primer on Asymmetric Digital Subscriber Line transmission technology.

Introduction to ADSL. NEXTEP Broadband White Paper. Broadband Networks Group. A primer on Asymmetric Digital Subscriber Line transmission technology. NEXTEP Broadband White Paper Introduction to ADSL A primer on Asymmetric Digital Subscriber Line transmission technology. A NEXTEP Broadband White Paper May 2001 Broadband Networks Group Introduction to

More information

WAN Technologies Based on CCNA 4 v3.1 Slides Compiled & modified by C. Pham

WAN Technologies Based on CCNA 4 v3.1 Slides Compiled & modified by C. Pham WAN Technologies Based on CCNA 4 v3.1 Slides Compiled & modified by C. Pham 1 Wide-area Networks (WANs) 2 Metropolitan-Area Network (MANs) 3 Path Determination 4 Internetworking Any internetwork must include

More information

Introduction to Computer Networks and Data Communications

Introduction to Computer Networks and Data Communications 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

More information

A General Glossary of Telecommunications Terminology

A General Glossary of Telecommunications Terminology 1 A General Glossary of Telecommunications Terminology Analog Electronic transmission of voice and data accomplished by adding signals of varying frequency, or amplitude, to carrier waves of a given frequency

More information

ESSENTIALS. Understanding Ethernet Switches and Routers. April 2011 VOLUME 3 ISSUE 1 A TECHNICAL SUPPLEMENT TO CONTROL NETWORK

ESSENTIALS. Understanding Ethernet Switches and Routers. April 2011 VOLUME 3 ISSUE 1 A TECHNICAL SUPPLEMENT TO CONTROL NETWORK VOLUME 3 ISSUE 1 A TECHNICAL SUPPLEMENT TO CONTROL NETWORK Contemporary Control Systems, Inc. Understanding Ethernet Switches and Routers This extended article was based on a two-part article that was

More information

Chapter 6. By Frankie, K. F. Yip MSN: frankie.sir@live.com Email: ask.frankie@gmail.com Facebook: register.frankie@gmail.com

Chapter 6. By Frankie, K. F. Yip MSN: frankie.sir@live.com Email: ask.frankie@gmail.com Facebook: register.frankie@gmail.com Chapter 6 The Internet By Frankie, K. F. Yip MSN: frankie.sir@live.com Email: ask.frankie@gmail.com Facebook: register.frankie@gmail.com 6 Background The ARPANET, created in 1969, connected computers at

More information

Course 1. General view on the fixed telephone network. Digital networks. General aspects. Definitions.

Course 1. General view on the fixed telephone network. Digital networks. General aspects. Definitions. Course 1. General view on the fixed telephone network. Digital networks. General aspects. Definitions. 1. General view on the fixed telephone network Communication network dedicated to voice transmission;

More information

Local-Area Network -LAN

Local-Area Network -LAN 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

More information

Network edge and network core. millions of connected compu?ng devices: hosts = end systems running network apps

Network edge and network core. millions of connected compu?ng devices: hosts = end systems running network apps Computer Networks 1-1 What s the Internet: nuts and bolts view PC server wireless laptop cellular handheld access points wired links millions of connected compu?ng devices: hosts = end systems running

More information

Next Generation Access Glossary. 21CN: BT s upgrade of their core network (the backbone of the network).

Next Generation Access Glossary. 21CN: BT s upgrade of their core network (the backbone of the network). Next Generation Access Glossary 21CN: BT s upgrade of their core network (the backbone of the network). Access network: The part of the network that connects directly to customers from the local telephone

More information

Local Area Network By Bhupendra Ratha, Lecturer School of Library and Information Science Devi Ahilya University, Indore Email: bhu261@gmail.com Local Area Network LANs connect computers and peripheral

More information

VoIP Glossary. Client (Softphone client): The software installed in the userâ s computer to make calls over the Internet.

VoIP Glossary. Client (Softphone client): The software installed in the userâ s computer to make calls over the Internet. VoIP Glossary Analog audio signals: Analog audio signals are used to transmit voice data over telephone lines. This is done by varying or modulating the frequency of sound waves to accurately reflect the

More information

Overview of Network Hardware and Software. CS158a Chris Pollett Jan 29, 2007.

Overview of Network Hardware and Software. CS158a Chris Pollett Jan 29, 2007. 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

More information

Communication Networks. MAP-TELE 2011/12 José Ruela

Communication Networks. MAP-TELE 2011/12 José Ruela 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)

More information

Telecommunications Technology

Telecommunications Technology Unit 12: Telecommunications Technology Unit code: K/601/3290 QCF Level 2: BTEC Specialist Credit value: 10 Guided learning hours: 60 Aim and purpose To enable learners to know how telecommunication systems

More information

Component 4: Introduction to Information and Computer Science

Component 4: Introduction to Information and Computer Science 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

More information

Chapter 9. Internet. Copyright 2011 John Wiley & Sons, Inc 10-1

Chapter 9. Internet. Copyright 2011 John Wiley & Sons, Inc 10-1 Chapter 9 Internet Copyright 2011 John Wiley & Sons, Inc 10-1 Outline 9.2 - How the Internet Works - Basic Architecture - Connecting to an ISP - Internet Today 9.3 - Internet Access Technologies - DSL

More information

How the Internet Works? ( TCP/IP, DNS, HKIX )

How the Internet Works? ( TCP/IP, DNS, HKIX ) How the Internet Works? ( TCP/IP, DNS, HKIX ) CSC1720 Introduction to Internet Essential Materials How computers send data? Channel Protocol Connection method Address CSC1720 Introduction to Internet 2

More information

Module 1 Communication Networks. Version 1 ECE, IIT Kharagpur

Module 1 Communication Networks. Version 1 ECE, IIT Kharagpur Module 1 Communication Networks Lesson 1 Communication Networks An Introduction and Overview INSTRUCTIONAL OBJECTIVES General This lesson is designed to give the reader the concept and definition of a

More information

What You Will Learn About. Computers Are Your Future. Chapter 8. Networks: Communicating and Sharing Resources. Network Fundamentals

What You Will Learn About. Computers Are Your Future. Chapter 8. Networks: Communicating and Sharing Resources. Network Fundamentals 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

More information

WAN Data Link Protocols

WAN Data Link Protocols WAN Data Link Protocols In addition to Physical layer devices, WANs require Data Link layer protocols to establish the link across the communication line from the sending to the receiving device. 1 Data

More information

The Internet and Its Uses

The Internet and Its Uses CHAPTER 1 The Internet and Its Uses Objectives After completing this chapter, you should be able to answer the following questions: How is the Internet evolving? How do businesses and individuals use the

More information

Broadband Primer. A Guide to High Speed Internet Technologies. Indiana Office of Utility Consumer Counselor

Broadband Primer. A Guide to High Speed Internet Technologies. Indiana Office of Utility Consumer Counselor Broadband Primer A Guide to High Speed Internet Technologies Indiana Office of Utility Consumer Counselor 100 N. Senate Av., Room N501 Indianapolis, IN 46204-2215 www.openlines.in.gov toll-free: 1-888-441-2494

More information

Lecture 1. Lecture Overview. Intro to Networking. Intro to Networking. Motivation behind Networking. Computer / Data Networks

Lecture 1. Lecture Overview. Intro to Networking. Intro to Networking. Motivation behind Networking. Computer / Data Networks 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

More information

Public Network. 1. Relatively long physical distance 2. Requiring a service provider (carrier) Branch Office. Home. Private Network.

Public Network. 1. Relatively long physical distance 2. Requiring a service provider (carrier) Branch Office. Home. Private Network. Introduction to LAN TDC 363 Week 4 Connecting LAN to WAN Book: Chapter 7 1 Outline Wide Area Network (WAN): definition WAN Topologies Choices of WAN technologies Dial-up ISDN T1 Frame Relay DSL Remote

More information

CPET 581 E-Commerce & Business Technologies. Topics

CPET 581 E-Commerce & Business Technologies. Topics CPET 581 E-Commerce & Business Technologies E-Commerce Infrastructure Lecture Note 2 of 2 References: *Chapter 3. E-Commerce Infrastructure: The Internet, Web, and Mobile Platform of text book: e-commerce:

More information

Video Conferencing Glossary of Terms

Video Conferencing Glossary of Terms Video Conferencing Glossary of Terms A Algorithm A step-by-step problem-solving procedure. Transmission of compressed video over a communications network requires sophisticated compression algorithms.

More information

Telecommunications systems (Part 1)

Telecommunications systems (Part 1) School of Business Eastern Illinois University Telecommunications systems (Part 1) (Week 11, Thursday 11/02/2006) Abdou Illia, Fall 2006 Learning Objectives 2 Describe and compare types of connection to

More information

CHAPTER 10 THE INTERNET

CHAPTER 10 THE INTERNET CHAPTER 10 THE INTERNET Chapter Summary This chapter examines the Internet in more detail to explain how it works and why it is a network of networks. The chapter also examines Internet access technologies,

More information

ATA: An Analogue Telephone Adapter is used to connect a standard telephone to a high-speed modem to facilitate VoIP and/or calls over the Internet.

ATA: An Analogue Telephone Adapter is used to connect a standard telephone to a high-speed modem to facilitate VoIP and/or calls over the Internet. KEY VOIP TERMS 1 ACD: Automatic Call Distribution is a system used to determine how incoming calls are routed. When the ACD system receives an incoming call it follows user-defined specifications as to

More information

MARATHON COUNTY TECHNOLOGY COMMITTEE

MARATHON COUNTY TECHNOLOGY COMMITTEE MARATHON COUNTY TECHNOLOGY COMMITTEE AMENDED AGENDA Date & Time of Meeting: Tuesday, July 22, 2014 at 7:00 a.m. Meeting Location: Corporation Counsel Conference Room - Courthouse Technology Committee Members:

More information

Written by Igal Rabinovich, CEO IT Help Central. How to Successfully Select and Implement a Hosted VoIP System Page 1

Written by Igal Rabinovich, CEO IT Help Central. How to Successfully Select and Implement a Hosted VoIP System Page 1 How to Successfully Select and Implement a Hosted VoIP System Written by Igal Rabinovich, CEO IT Help Central How to Successfully Select and Implement a Hosted VoIP System Page 1 TABLE OF CONTENTS EXECUTIVE

More information

Networks 3. 2015 University of Stirling CSCU9B1 Essential Skills for the Information Age. Content

Networks 3. 2015 University of Stirling CSCU9B1 Essential Skills for the Information Age. Content Networks 3 Lecture Networks 3/Slide 1 Content What is a communications protocol? Network protocols TCP/IP High-level protocols Firewalls Network addresses Host name IP address Domain name system (DNS)

More information

Broadband a consumer guide. August 2003. Textphone 020 7634 5370 Web www.oftel.gov.uk. Switchboard 020 7634 8700 Fax 020 7634 8943

Broadband a consumer guide. August 2003. Textphone 020 7634 5370 Web www.oftel.gov.uk. Switchboard 020 7634 8700 Fax 020 7634 8943 =>? Broadband a consumer guide August 2003 50 Ludgate Hill London EC4M 7JJ Switchboard 020 7634 8700 Fax 020 7634 8943 Textphone 020 7634 5370 Web www.oftel.gov.uk Crown copyright 2003 2 Contents What

More information

Lecture 21 ISDN Integrated Digital Network.

Lecture 21 ISDN Integrated Digital Network. Lecture 21 ISDN is an acronym for Integrated Services Digital Network. ISDN was developed to cater the needs of users who want high data rate, since conventional telephone line is not capable of providing

More information

An automated system designed to guide a caller through the options of a voice menu. Typically set to answer and route incoming calls.

An automated system designed to guide a caller through the options of a voice menu. Typically set to answer and route incoming calls. Jargon Buster Access Server An Access Server or Network Access Server connects devices to a Local Area Network (LAN) or Wide Area Network (WAN). Internet Service Providers are able to provide customers

More information

Future Stars. Grade X Manual Chapter 1 Networking and Telecommunication. telecommunication. Telephones, telegrams, radios and televisions help

Future Stars. Grade X Manual Chapter 1 Networking and Telecommunication. telecommunication. Telephones, telegrams, radios and televisions help 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.

More information

Chapter 6 Telecommunications, Networks, and Wireless. Computing

Chapter 6 Telecommunications, Networks, and Wireless. Computing Chapter 6 Telecommunications, Networks, and Wireless Computing Essay Questions: 1. Define a hub, switch, and a router. 2. List the challenges associated with managing contemporary telecommunications and

More information

COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION

COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION Answers to End-of-Chapter Questions Matching g 1. whiteboard i 2. sending device o 3. streaming j 4. WiFi m 5. Webcam d 6. data transfer

More information

Downloaded from Downloaded from / 1

Downloaded from  Downloaded from  / 1 VIII SEMESTER FINAL EXAMINATION- 2004 Q. [1] [a] Write brief about Evolution of Telecommunication. [b] How are the switching system classified? Describe them. [c] How many point to point links are required

More information

Traffic load and cost analysis for different IPTV architectures

Traffic load and cost analysis for different IPTV architectures Traffic load and cost analysis for different IPTV architectures SKENDER RUGOVA, ARIANIT MARAJ Post and Telecommunication of Kosova-PTK Dardania, p.nr., Prishtina, Republic of Kosova Skender.rugova@ptkonline.com,

More information

Open Access Fibre Networks

Open Access Fibre Networks Open Access Fibre Networks Contact: 087 470 0800 www.octotel.co.za hello@octotel.co.za 76 Regent Rd, Sea Point, Cape Town Open Access Fibre for Apartment Buildings Super fast Fibre internet for your residents,

More information

EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak

EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak Packet Switching and Computer Networks Switching As computer networks became more pervasive, more and more data and also less voice was transmitted over telephone lines. Circuit Switching The telephone

More information

BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS. BCS Level 5 Diploma in IT SEPTEMBER 2014. Computer Networks EXAMINERS REPORT

BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS. BCS Level 5 Diploma in IT SEPTEMBER 2014. Computer Networks EXAMINERS REPORT BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT SEPTEMBER 2014 Computer Networks EXAMINERS REPORT General Comments This session is again like the April

More information

Oct 15, 2004 www.dcs.bbk.ac.uk/~gmagoulas/teaching.html 3. Internet : the vast collection of interconnected networks that all use the TCP/IP protocols

Oct 15, 2004 www.dcs.bbk.ac.uk/~gmagoulas/teaching.html 3. Internet : the vast collection of interconnected networks that all use the TCP/IP protocols E-Commerce Infrastructure II: the World Wide Web The Internet and the World Wide Web are two separate but related things Oct 15, 2004 www.dcs.bbk.ac.uk/~gmagoulas/teaching.html 1 Outline The Internet and

More information

Communication Systems I

Communication Systems I Communication Systems I Course Map Contents Recap of the networks we ve seen so far Basics of protocols HTTP example The OSI model Packet and Circuit switching Physical media What to expect next Recap

More information

Chapter 9 Using Telephone and Cable Networks for Data Transmission

Chapter 9 Using Telephone and Cable Networks for Data Transmission 9-11 TELEPHONE NETWORK Chapter 9 Using Telephone and Cable Networks for Data Transmission 1 McGraw-Hill Copyright The McGraw-Hill Companies, Inc. Permission required The for reproduction McGraw-Hill or

More information

Bandwidth Primer The basic conditions and terms used to describe information exchange over networks.

Bandwidth Primer The basic conditions and terms used to describe information exchange over networks. The basic conditions and terms used to describe information exchange over networks. 385 Jordan Road Troy, NY 12180 Phone 518.286.7000 518.286.2439 www.learnlinc.com Table of Contents TABLE OF CONTENTS...2

More information

Computer Networking Networks

Computer Networking Networks 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

More information

Computer Networks. Computer Networks. Telecommunication Links. Connecting. Connecting via Telephone Lines ISDN

Computer Networks. Computer Networks. Telecommunication Links. Connecting. Connecting via Telephone Lines ISDN Chapter 12 Topics: Communication links LAN / WAN Internet / WWW A computer network is a set of independent computer systems interconnected by telecommunication links. CMPUT101 Introduction to Computing

More information

CMPT 165: The Internet, Part 3

CMPT 165: The Internet, Part 3 CMPT 165: The Internet, Part 3 Tamara Smyth, tamaras@cs.sfu.ca School of Computing Science, Simon Fraser University September 15, 2011 1 Basic Communication Technology Packet Switching (sharing a tranmission

More information

VDSL (VERY HIGH DATA BIT RATE DIGITAL SUBSCRIBER LINE)

VDSL (VERY HIGH DATA BIT RATE DIGITAL SUBSCRIBER LINE) 1 VDSL (VERY HIGH DATA BIT RATE DIGITAL SUBSCRIBER LINE) INTRODUCTION 1. Recent events in the telecommunications environment are giving rise to a new class of service providers, setting the stage for how

More information

Management Information Systems

Management Information Systems Management Information Systems Basics of the Internet Dr. Shankar Sundaresan (Adapted from Introduction to IS, Rainer and Turban) Internet Basics Outline Internet History Internet Structure Switching Methods

More information