Computer Science 1032A/B Chapter Notes - Chapter 6: Bring Your Own Device, Local Area Network, Optical Fiber Cable

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Shauna Burke

Document Summary

Computer network: network: collection of computers that transmit and/or receive electronic signals through transmission media. The internet: (capital i") email, access website. Internets: private network of networks: protocol: set of rules 2 communicating devices follow. Core surrounded by cladding (contain light signals); cladding- wrapped w/ outer layer=protect. Transmission at rate of 10, 100, 1000 mbps (megabits per second) Wireless lans: laptop, tablet, smartphone- equipped w/ wireless nic (wnic, move around w/o needing to plug into cable, 802. 11 or wi-fi, access points (aps): connect users to wired network; 40-100 m. Factors: location (indoors, outdoors-wider range), weather, obstructions (steel-reinforced concrete pillars), power output of devices. Repeaters & reflectors: amplify & reflect signals to extend range. I. e. ap- process messages on 802. 3 & 802. 11 standards b/c wireless protocol uses 802. 11 protocol & switch using 802. 3 protocol. Connecting to internet: router: special purpose computers that implement protocol for wans. Connects computer to computers owned/operated by international service provider (isp)