14-10-2010, 09:27 AM
IP Address Classes
How large is the network part in an IP address?
Today we use network masks to tell
Originally, IP had address classes with fixed numbers of bits in the network part
Class A: 8 bits (24 bits in local part)
Class B: 16 bits (16 bits in local part)
Class C: 24 bits (8 bits in local part)
Class A IP Address
IP address begins with 0
7 remaining bits in network part
Only 128 possible Class A networks
24 bits in local part
Over 16 million hosts per Class A network!
All Class A network parts are assigned or reserved
Class B IP Address
IP address begins with 10 (1st zero in 2nd position)
14 remaining bits in network part
Over 16,000 possible Class B networks
16 bits in local part
Over 65,000 possible hosts
A good trade-off between number of networks and hosts per network
Most have been assigned
For more information about this article,please follow the link:
http://googleurl?sa=t&source=web&cd=1&ve...lasses.ppt&ei=Rn-2TM_zG4emcOWYja0D&usg=AFQjCNEZn0Yh7wKmgOHCAITLqh6o2TWfmw
How large is the network part in an IP address?
Today we use network masks to tell
Originally, IP had address classes with fixed numbers of bits in the network part
Class A: 8 bits (24 bits in local part)
Class B: 16 bits (16 bits in local part)
Class C: 24 bits (8 bits in local part)
Class A IP Address
IP address begins with 0
7 remaining bits in network part
Only 128 possible Class A networks
24 bits in local part
Over 16 million hosts per Class A network!
All Class A network parts are assigned or reserved
Class B IP Address
IP address begins with 10 (1st zero in 2nd position)
14 remaining bits in network part
Over 16,000 possible Class B networks
16 bits in local part
Over 65,000 possible hosts
A good trade-off between number of networks and hosts per network
Most have been assigned
For more information about this article,please follow the link:
http://googleurl?sa=t&source=web&cd=1&ve...lasses.ppt&ei=Rn-2TM_zG4emcOWYja0D&usg=AFQjCNEZn0Yh7wKmgOHCAITLqh6o2TWfmw
