IP address auxiliary address group is a class A address group. The Class A network address can be identified through the unique one of the 32-bit address, the highest bit. 0 N N N N N N L L1 L L1 L1 Ll L L L1 In this packet, you can see a Class A address with a 3 2 digit. The first 8 bits of the Class A address represent the network number, the remaining 2 4 digits can be modified by the management user of the management network address, which represents the address on the "Local" host. In the above address representation, multiple N represents the network number in the address; multiple L represents the local manageable address portion. As seen above, the highest bit of the Class A network address is always 0. Due to the first bit of the A class address, the network number of the Class A address starts from 1, and the end of 127. Since the local manageable space is composed of 24 bits, the number of local addresses is 2 ^ 24 or 16777,216 in the Class A address. Each network administrator that gets A-class addresses can assign addresses 1,600 million hosts. But to remember, because only 127 A class addresses, there can only be 127 large networks. The network number of the A class address is from 1.0.0.0 (minimum address) to the end of 127.0.0.0 (maximum address). The private address is: 10.0.0.0--10.255.255.255 The next set of addresses of the B-class address is a class B address. Class B address is also identified by unique bit mode in a 32-bit address. 1 0 N N N N N N N N N N N N L L1 L L1 L L1 In this example, the class B address is represented by 3 2 digits. The top 16 bits of the class B address represent the network number, and the remaining 16 bits can be modified by users who manage the network address. This 16-digit address represents the address on the "local" host. Class B network address is identified by the highest two digits. Due to the first two digits of the Class B address, the network number of the class B address is from 128 and the end of 191. In the Class B address, the second point division is also part of the network number. The 16-bit address space size of each Class B address is 2 ^ 16 or 65536. The number of available B networks is 16384. These network numbers from 128.0.0.0 (minimum address) to 191.255.0.0 (maximum address). Since the network number of the Class B address is 16 bits, the number of heads of the header represent the network number. Among them, the private address is: 127.16.0.0--127.31.255.255 Class C Address The next set of addresses is a C class address. Class C addresses are also identified by unique bit modes in the 32-bit address. 1 1 0 N N N N N N N N N N N N N 1 1 1 1 1 1 1 In this example, a 32-bit number representation can be seen. The first 24 bits of the Class C address represent the network number, and the remaining 8 bits can be modified by users who manage the network address. This 8-digit address represents the address on the "local" host. Class B network addresses are identified by the highest triple 110. Due to the first three bits of the C class address, the network number of the C class address is starting from 192 and the 223 ends. In Class C addresses, the second and third point divisions are also part of the network number. The 8-bit address space-managed 8-bit address space managed each Class Class is 2 ^ 8 (or 256). The number of Class C networks that can be managed is 2097152. Here are some Class C network numbers: These network numbers from 192.0.0.0 (minimum address) to 223.255.255.0 (maximum address).
Since the network number length of the C class address is 24 bits, the first three points of the decimal number represent the network number. Among them: 192.168.0.1--192.168.255.255 Total number of new number of new number of network numbers in the three type address characteristics
A82412716777216
B16161638465536
C2482097152256
