Subnet Mask, Mask Bits, IP Address Calculator

1. Different IP Address Representations:

A Class A IP address means that in the four segments of the IP address, the first segment is the network number, and the remaining three segments are the local computer number. If the IP address is represented in binary, a Class A IP address consists of 1 byte of network address and 3 bytes of host address, and the highest bit of the network address must be "0". In a Class A IP address, the network identifier length is 8 bits, and the host identifier length is 24 bits.

A Class B IP address means that in the four segments of the IP address, the first two segments are the network number. If the IP address is represented in binary, a Class B IP address consists of 2 bytes of network address and 2 bytes of host address, and the highest bit of the network address must be "10". In a Class B IP address, the network identifier length is 16 bits, and the host identifier length is 16 bits.

A Class C IP address means that in the four segments of the IP address, the first three segments are the network number, and the remaining one segment is the local computer number. If the IP address is represented in binary, a Class C IP address consists of 3 bytes of network address and 1 byte of host address, and the highest bit of the network address must be "110". In a Class C IP address, the network identifier length is 24 bits, and the host identifier length is 8 bits.

2. Different IP Address Ranges:

Class A IP address range is from 1.0.0.1 to 127.255.255.254 (in binary: 00000001 00000000 00000000 00000001 - 01111111 11111111 11111111 11111110). The last one is the broadcast address.

Class B IP address range is from 128.0.0.1 to 191.255.255.254 (in binary: 10000000 00000000 00000000 00000001 - 10111111 11111111 11111111 11111110). The last one is the broadcast address.

Class C IP address range is from 192.0.0.1 to 223.255.255.254 (in binary: 11000000 00000000 00000000 00000001 - 11011111 11111111 11111111 11111110). The last one is the broadcast address.

3. Different Subnet Masks:

Class A IP address subnet mask is 255.0.0.0

Class B IP address subnet mask is 255.255.0.0

Class C IP address subnet mask is 255.255.255.0

4. Different Application Scopes:

Class A is suitable for large networks. The number of Class A network addresses is relatively small, with 126 networks, and each network supports a maximum of 256^3-2=16,777,214 hosts;

Class B is suitable for medium-sized networks. The number of Class B network addresses is moderate, with 16,384 networks, and each network supports a maximum of 256^2-2=65,534 hosts;

Class C is suitable for small networks. The number of Class C network addresses is large, with more than 2.09 million networks, suitable for small-scale local area networks, and each network supports a maximum of 256^1-2=254 hosts.

The subnet mask calculator is a tool that can quickly and conveniently calculate subnet division. This software allows you to freely adjust the mask bits, so it can be used to calculate non-standard subnets. As long as the user enters a dotted decimal IP address in this IP subnet mask calculator, it can immediately determine the address class, and display its subnet bits, host bits, the number of subnets that meet the conditions, the number of valid hosts contained in each subnet, the subnet address, subnet mask, subnet broadcast address, and the host range contained in the current subnet. Basically, it calculates all the data you want to get.