8 device used to route packets of data through

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Unformatted text preview: medium Network operating system Hub or switch • Routers • 6.8 Device used to route packets of data through different networks, ensuring that data sent gets to the correct address Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless Telecommunications and Networking in Today’s Business World Components of a Simple Computer Network Figure 6-1 Illustrated here is a very simple computer network, consisting of computers, a network operating system residing on a dedicated server computer, cabling (wiring) connecting the devices, network interface cards (NIC), switches, and a router. 6.9 Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless Telecommunications and Networking in Today’s Business World Networks in Large Companies • Components can include: • • Hundreds of local area networks (LANs) linked to firmwide corporate network Various powerful servers • • 6.10 Corporate intranet, extranet • • • • • Web site Backend systems Mobile wireless LANs (Wi-Fi networks) Videoconferencing system Telephone network Wireless cell phones Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless Telecommunications and Networking in Today’s Business World Corporate Network Infrastructure Figure 6-2 Today’s corporate network infrastructure is a collection of many different networks from the public switched telephone network, to the Internet, to corporate local area networks linking workgroups, departments, or office floors. 6.11 Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless Telecommunications and Networking in Today’s Business World Key Digital Networking Technologies • Client/server computing • • Clients linked through network controlled by network server computer • Server sets rules of communication for network and provides every client with an address so others can find it on the network • Has largely replaced centralized mainframe computing • 6.12 Distributed computing model The Internet: Largest implementation of client/server computing Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless Telecommunications and Networking in Today’s Business World Key Digital Networking Technologies • Packet switching • • Previous circuit-switched networks required assembly of complete point-to-point circuit • 6.13 Method of slicing digital messages into parcels (packets), sending packets along different communication paths as they become available, and then reassembling packets at destination Packet switching more efficient use of network’s communications capacity Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Chapter Wireless Technology Wireless Telecommunications and Networking in Today’s Business World Packet-Switched Networks and Packet Communications Figure 6-3 Data are grouped into small packets, which ar...
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This document was uploaded on 02/11/2014.

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