INTERNET ADDRESS

  • It's a 32 bits, 4-part period delimited, decimal number called IP number or IP address:

    www.xxx.yyy.zzz

  • each part can vary from 1 to 254 (0 and 255 are reserved for the net and the broadcast)
  • each network interface card attached to the Internet mast have an unique IP address
  • the IP address can be splitted in two parts:
    • network
    • host

 

CLASSES:


 class A net: NNN.hhh.hhh.hhh 


 NNN: 1 to 127 


 class B net: NNN.nnn.hhh.hhh 


 NNN: 128 to 191 


 class C net: NNN.nnn.nnn.hhh 


 NNN: 192 to 223