1. Telecommunications and Networks Business value of networks Network components Chapter 6 McGraw-Hill/Irwin Copyright © 2007 by The McGraw-Hill Companies, Inc. All rights reserved.

2. 6-2 Telecommunications Exchange of information in any form (voice, data, text, images, audio, video) over networks

3. 6-3 Industry Trends Commercial telecommunication industry De-regulated market with many suppliers of telecom Broadcast TV, HD TV, Video on demand Video / Online Games Online Distance Learning, Teleconferencing Internet access, Internet phone (VoIP), Cellular

4. 6-4 Technology Trends Open Systems Information systems that use common standards for hardware, software, applications and networks Middleware Any programming that serves to “glue together” two separate already existing programs

5. 6-5 Internet Service Provider ISP A company that specializes in providing easy access to the Internet For a monthly fee, you get software, user name, password and access

6. 6-6 Application Trends Internet / World Wide Web Do NOT have a central computer system or telecom center e-business processes, E-commerce, enterprise collaboration

7. 6-7 Using the Internet for business

8. 6-8 Application Trends Business Intranet Use internet technology – Browsers, HTML, TCP/IP Secured by encryption, firewall

9. 6-9 Business Intranet

10. 6-10 Application Trends Business Extranet Secure link between business Intranet Virtual Private Network - VPN

11. 6-11 Extranet Uses

12. 6-12 Telecommunications network components and types Terminals: any input/output device that uses networks to transmit or receive data Computers/Servers: all sizes and types Telecommunications Channels: media over which data are transmitted and received - wired or wireless Telecommunications Processors: devices that support data transmission and reception - Dial-up /DSL Cable modem Telecommunications Control Software: programs that control telecommunications activities

13. 6-13 Wide Area Network (WAN) Telecommunications network that covers a large geographic area Metropolitan Area Network - MAN Source: Courtesy of Cisco Systems Inc.

14. 6-14 Local Area Network (LAN) Connect computers within a limited physical area such as an office, classroom, or building

15. 6-15 Virtual Private Networks (VPN) A secure pipe traveling through the Internet

16. 6-16 TCP/IP Protocol LayerNameSpecific FunctionBroad Function 5ApplicationBrowsers, Email, File transferWork with applications 4Transport (TCP) End-to-end communication, TCP PORT # Inter- network 3Network (IP) Data packet transmission / routing, IP address Inter- network 2Data LinkHardware device, network card, hub, switch Single network 1PhysicalMedia, cableSingle network