MCS-170 The Nature of Computer Science
Chapter 3 - Part 3
Timeline of The
Internet and The Web
established, ARPANET expands
- 1971 Arpanet increases to 15
- 1972 Ray Tomlinson creates an email
program for ARPANET. He picks the "@" symbol to spearate the
username and address as it was easily available on teletype machines.
- 1972-1972 Telnet and FTP protocols were established.
Telnet allows remote login across a network and ftp allows file
transfers between sites.
- 1974 Vinton Cerf and Bob Kahn develop TCP/IP network
- IP - Controls
how computers identify each other and how packets are labelled.
(IP address - Number ID for a computer, like 188.8.131.52)
- TCP - Controls
how messages are boken down into packets and then re-assembled at
destination. (packet size <= 1500 bytes) (Overhead)
configuration - run "/sbin/ifconfig" on classroom machine
- Domain Name System: User-friendly
names are given as substitutes for IP address. Example --
pokey.mcs.gac.edu is domain name for 184.108.40.206
Domains: edu, com, org, mil, gov, net, ca, uk
Domain Name Servers (Overhead)