Each IP address have subnet mask which contains the boundaries for that address and associate it with the particular class .
The Subnet mask is changed accordingly to reflect subnetting. Given below is a list of all possible combination of Class A subnets:
In case of subnetting too, the very first and last IP address of every subnet is used for Subnet Number and Subnet Broadcast IP address respectively.
Class B Subnets
By default, using Classful Networking, 14 bits are used as Network bits providing (214) 16384 Networks and (216-1) 65534 Hosts.
Class B IP Addresses can be subnetted the same way as Class A addresses, by borrowing bits from Host bits. Below is given all possible combination of Class B subnetting:
Class C Subnets
Class C IP addresses are normally assigned to a very small size network because it can only have 254 hosts in a network. Given below is a list of all possible combination of subnetted Class B IP address:
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