COMP 2057 Lecture Notes - Lecture 2: Local Area Network, Bit Rate, Shared Medium
24 Jul 2019
School
Department
Course
Professor
Document Summary
Basic unit of info, usually a binary digit (ie: 0/1, +/-, t/f, yes/no), basically any two valued attribute. Maximum transmission capacity of a device, measured by bitrate. Number of bits per second a system can transmit. Time it takes for one bit to travel from a sender to receiver. Family of computer networking technologies commonly used in lan, wan, man networks. Original ethernet used coaxial cables as a shared medium. New ethernet uses twisted pair and fiber optic links in conjunction with switches. Rates of transfer over time: 2. 94 megabits/s " 100 gigabits/s. Made by glass/silica/plastic, diameter slightly thicker than that of human hair. Transmit light, permits transmission over longer distances and at higher bandwidths than cables. Immune to electromagnetic interference, where metal wires are not. Wifi compatible devices connect to internet via wlan. Interconnects computers within limited area (ie: residence, school, lab, office building)
