EECS 1012 Lecture Notes - Lecture 1: Internet Engineering Task Force, Vint Cerf, Data Link Layer

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1012
• Professor: Michael Brown

Document Summary

Internet www: a collection of computer networks that use a protocol to exchange data. History: began as a us department of defense network called arpanet (1960s-0s, tcp/ip beginning on 1974 (vinton cerf, 1987 internet includes nearly 30,000 hosts, www created in 1889-1991 by tim berners-lee. Key aspects of the internet: sub networks are independent, computers can dynamically join and leave the network, built on open standards, lack of centralized control, simple, commonly available software, everyone can use it. Internet engineering task force (ietf): internet protocol standards. Internet corporation for assigned names and numbers (icann):decides top-level domain names: world wide web consortium(w3c): web standards. Physical layer : devices such as ethernet, coaxial cables, fiber-optic lines, modems. Data link layer: basic hardware protocols (ethernet, wifi, dsl ppp) Transport layer: adds reliability to network layer (tcp,udp) Application layer: implements specific communication for each kind of program (http,pop3/imap,ssh,ftp) 32-bit for ipv5 : (valid if the four numbers are between 0-255)