Assigned Numbers
J.K. Reynolds, J. Postel · 1984
The network numbers listed here are used as internet addresses by the Internet Protocol (IP) [31,71].The IP uses a 32-bit address field and divides that address into a network part and a "rest" or local address part.The division takes 3 forms or classes.The first type of address, or class A, has a 7-bit network number and a 24-bit local address.The highest-order bit is set to 0. This allows 128 class A networks. 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+