Welcome to – IT 220Network Standards and Protocols

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Syllabus

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Network Introduction, Network Introduction, Overview and ClassificationOverview and Classification

Unit 1, Chapter 1 & 2What is a Computer Network?

Copyright ©2005 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458

All rights reserved.

Objectives

Review History of NetworksTypes of communications and TelecommunicationsDefine the terms LAN, WAN, MAN Identify communication networksDescribe different types of network topologies, discuss their advantages and disadvantages, and how they are designed.Describe network classificationsDescribe importance of voice networks

Network Terminology (pgs 8-10)

Communications – Science of transmitting meaningful information

Telecommunications Communications by electrical or electromagnetic

means over a distanceNetwork

Interrelated group of objects connected together in some way

Elements of a Network(pgs 10-11)

Source Transmitter, PC,Telephone….Medium

Medium, Cable, Circuit….Sink

Receiver, PC/Server,TelephoneRules (Protocols)

Hello, Hi John?, John, this is Bill…….`

Transmission Media

Coaxial Cable – Cable TVTwisted Pair (Shielded & Unshielded)Multimode & Single Mode FIberAir

Telecommunications History

Telegraph -1844 Samual MorseTeleprinting Machine – Eliminate Operators, used code to interpret message – Baudot CodeTeletypewriter (TTY) – Teletypewriter exchange service, network of teletypewriter printersTelephone – 1876 Alexander Graham BellTrying to solve multiple signals on the same wire

Analog Versus Digital

Analog – Signal amplitude or frequency modulation– Continuously Variable– Power 60hz

Digital – Discrete State– On = 1, Off = 0

Encoding Methods – Analog Methods: Amplitude Modulation

Copyright ©2005 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458

All rights reserved.

Network Classifications

Local Area Network (LAN)– Limited Geographical Distance

Wide Area Network (WAN)– Long Distance– Commercial Carrier (Switched, Leased, Satellite…)

Metropolitan Area Network – Cover area larger than a campus – Connect several LANS

Network Topology

StarHierarchical NetworksMesh NetworksBus NetworksRing NetworksWireless

Network Topology

Copyright ©2005 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458

All rights reserved.

Wireless Networks

Copyright ©2005 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458

All rights reserved.

Network Ownership

Public– Built Owned by communications company– Internet– Public Switched Telephone Network (PSTN)

Private– Dedicated, Leased Lines

Value Added Networks– Messaging (EDI)– Banking

Public Switched Telephone Network

Central Office – Connection Point from home/Bus.Local Loop – Wiring back to CODrop Wire – Wiring from the home/Bus.Distribution Cable – Collection of Drop WiresDemarc – Termination point for wiring in home/Bus.Switch - Route telephone callsEnd Office – CO switch between Bus. & HomesPrivate Branch Exchange(PBX) – Internal switch

Review Questions

1. A set of rules that guide the progress of a message from sender to receiver is called a __________________________.a. portb. protocolc. regulationd. conversation

Review Questions

2. Central offices (COs) contain computers called local loops that route and connect telephone calls and are optimized to perform specific functions.a. Trueb. False

Review Questions

3. In the telephone system, a computer in a central office _________.a. switches calls between telephonesb. totally eliminates the need for telephone operatorsc. only exists to handle billing and administrative tasksd. is no longer required in modern telephone networks

Review Questions

4. Three ways to classify networks are by __________________, ___________________, and _____________________.a. securityb. geographyc. topologyd. ownership

Review Questions

5. A star network can accurately be compared to a typical corporate organization chart.a. Trueb. False

Review Questions

6. Networks in which all circuits radiate from a central node are called __________.a. radial arm networksb. pinwheel networksc. hierarchical networksd. star networks

Review Questions

7. Rules that guide the progress of messages through a network are called _____.a. mediab. circuitsc. switchesd. protocols

Review Questions

8. A teletypewriter is a _____________.a. talking typewriterb. device that switches analog signalsc. forerunner of email systemsd. personal computer printer connected by infrared

signals

Review Questions

9. Networks that cover a short distance with high bandwidth are called ____________.a. WANsb. LANsc. SGANsd. hybrid networks

Review Questions

10. Networks provided by telephone companies that cover a broad geographic area are called ___________.a. hierarchical networksb. PBXsc. ring networksd. WANs

Homework

Assignment: Due Next week– Review

• Chapter 1, pp. 4-20• Chapter 2, pp. 26-42

– Read:• Chapter 3, pp. 48-66• Chapter 4, pp. 72-82

– Complete:• Assignment 1.1: Chapter 2, Multiple choice Questions p 44-45 • Assignment 1.2: Duplicate pg 30 in Microsoft in Visio

Lab

Lab 1.1: 568B Ethernet cable– Use 5’ of grey-jacketed,

solid UTP cable– Follow color scheme

Lab 1.2: 568B Ethernet cross-conenct cable– Use 1.5’ of red-jacketed,

stranded UTP cable