CHAPTER 6

Networks

Size of Computer Networks

Home computer network

National computer network

Global computer network

Local Area Networks

Enterprise Network

Communications Media and Channels

Twisted-pair wire

Coaxial cable

Fiber optics

Sources: deepspacedave/Shutterst ock, GIPhotoStock/Photo Researchers, Inc, Philip Hatson/Photo Researchers

Network Protocols

Ethernet

Transmission Control Protocol/Internet Protocol (TCP/IP)

Packet Switching

Analog and Digital Signals

Types of Network Processing

Client/server computing

Peer-to-peer processing

© Matthias Pahl/Age Fotostock America, Inc.

© Toh Kheng Ho/Age Fotostock America, Inc.

An Intranet

© Corbis/Age Fotostock America, Inc.

Addresses on the Internet

IPv432 bits 128 bits

IPv6

The World Wide Web

The World Wide WebNot the same thing as the Internet

Home page

Uniform resource locator

© Ilin Sergey/Age Fotostock America, Inc.

Internet Address example

www.business.auburn.edu

Top level domain: edu

Name of the organization: Auburn University

Name of the specific computer: business

Publication of Material in Foreign Languages

Voice Communication

Two examples of Internet telephony (VoIP)

Skype

Vonage

Collaboration

Work group

Virtual group (team)

Source: Howard Kingsnorth/The ImageBank/Getty Images, Inc.

Crowdsourcing

© YURI ACURS/Age Fotostock America, Inc.

Telepresence Systems

See video on Cisco Magic

Source: PRNews Foto/Polycom, Inc./NewsCom