They rely on packet switching and the use if IP addresses to locate devices on an IP network or on the Internet . Because 0 and 255 are used for unknown and broadcast addresses, normal hosts should never be given addresses containing 0 or 255. Addresses should never begin with 0, 127, or any number above 223. Addresses violating these rules are sometimes referred to as “Martians”, because of rumors that the Central University of Mars is using network 225. TCP/IP is a set of protocols developed to allow cooperating computers to share resources across a network. It was developed by a community of researchers centered around the ARPAnet.
- TCP takes the information sent by a person and breaks into small parts called packets.
- The most common alternative is UDP (“user datagram protocol”).
- Throughout the text, you will find references to the standards, in the form of “RFC” or “IEN”