COB 204 Lecture Notes - Lecture 5: Metropolitan Area Network, Intranet, Wide Area Network
Document Summary
Computers have to communicate through their own language . Internet- world"s most extensive network: internet service providers (isps) T1/t3 lines (ier 1 and ier 3: t1- standard for data communicaion developed by at&t in the. 60"s, typically costs ,000 (isp backbone: t3- more expensive, connecing to an isp (funcions) Network- a collecion of computers and devices connected together via communicaions devices and transmission media (does not have to be on the internet to be a considered a network) A switch and a router are communicaion tools: switches connect other devices together, routers connect to other networks. Types of networks: local network- connects computers and devices in a limited geographical area, metropolitan area network (man)- connects lans in a metropolitan area, wide area network (wan)- covers a large geographical area. Networks in large companies: hundreds of lans linked to irm-wide corporate network, various powerful servers. Backend systems (dbms: mobile wireless lans (wi-i, videoconferencing, telephone network, wireless cell phones.
