Computer Science 1032A/B Study Guide - Wide Area Network, Darpa, Local Area Network

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Diane Goldstein

Document Summary

Computers tend to be more useful when connected to networks. Network: collection of computers, communication over transmission line. Types: local area network (lan) single physical site, wide area network (wan) Computers connected together at a single physical site: any number of computers, one small geographic area, communication lines placed where they are needed. Connect to computers in different geographical areas physically separated. Use a variety of communication networks licensed by government. The internet: sending email and browsing. Uses a variety of communication methods and conventions. Layered protocols provides a seamless flow of data. Incompatible computers: operating systems, hardware, software, primitive communications technology. Solution: arpanet (advanced research projects agency network, 1969 requested by department of defence. Switch: special purpose computer that receives and transmits messages in the lan, may have more than one per lan. Network interface card (nic: hardware to connect each device to the cable, built-in nic or expansion slot card. Mac (media access controller) address: unique identifier.