There are a total of 126 networks with 16,777,214 addresses per network in a Class A Address of ipv4. Such a big range Ha!
Class A (0-127) In Class a there is 1 network bit and 3 host bits.
Class C (192-223) In Class C there is 3 network bits and one host bit.
16 384 networks are available in Class B network.
Over 16,000,000
A class C network supports the most networks - the first three octets or 24 bits gives the largest grouping of networks.
Wide area networks can consist of many local area networks, but it is possible for a wide area network to be a single network.
In a class B IP address, the first two bytes represent the network.The first two bits are 1 and 0, which means that there are 214 (10 000000 00000000 to 10 111111 11111111) network possibilities, which is 16,384 possible networks. The networks available in class B are therefore networks going from 128.0.0.0 to 191.255.0.0.The two bytes to the left represent the computers on the network. The network can therefore contain a number of computers equal to:216-21 = 65,534 computers.
in Class A addresses the first bit identifies the class. The next 7 bits identify the network and the rest are the IP's that belong to that network. However these networks are then broken down using subnets . Class A networks are not given to private clients or small private organisations. So if you want to know how many bits are there for identifying hosts in a Class A network, the answer is 32-8 = 24 bits. However if you mean how many bits are reserved for hosts in your private network space, that depends on your subnet and router. Most routers use NAT to allow multiple hosts to use a single external IP address. I hope this answers your question :)
First octet rule for each class:Class A: 0xxxxxxxClass B: 10xxxxxxClass C: 110xxxxxClass A range is 0 - 1270.0.0.0 and 127.0.0.0 are not "routable" IP addresses. One defines all networks and the other is the loopback. We have a total of 126 usable networks and 16,777,214 usable hostaddresses per network. There are even less if we don't count the private address of 10.0.0.0 (RFC 1918).Class B range is 128 - 191There are 16,384 total networks in this class; that's including the private addresses of 172.16.0.0 - 172.31.0.0 (RFC 1918). There are a total of 65,534 usable host addresses per network.Class C range is 192 - 223There are 2,097,152 total networks in this class; that's including the private addresses of 192.168.0.0 - 192.168.255.0 (RFC 1918). There are 254 usable hosts addresses per network.
How many possible host addresses are there in a Class A range?Class A range is 0 - 1270.0.0.0 and 127.0.0.0 are not "routable" IP addresses. One defines all networks and the other is the loopback. We have a total of 126 usable networks and 16,777,214 usable hostaddresses per network.
singular: network plural: networks
The idea is to use networks that are larger than a traditional (i.e., classful) network - especially, larger than a class-C network.
In a Class B range, the first network address would be 128.0.0.0 and the last network address would be 191.255.0.0 Class B addresses are assigned to medium-sized to large-sized networks with up to 65,534 hoasts per network.