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This article introduces the relevant knowledge of "the method of distinguishing abc ip addresses". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Distinguishing method: 1, class An IP address, the first paragraph number is the network number, the remaining three segments are the number of the local computer; 2, the class B IP address, the first two segments of the number are the network number; 3, the class C IP address, the first three segments of the number is the network number, and the remaining number is the number of the local computer.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

1. Class An IP address:

A Class An IP address means that in the four segments of the IP address, the first number is the network number and the remaining three numbers are the numbers of the local computer.

If the IP address is represented in binary, the class An IP address consists of a 1-byte network address and a 3-byte host address, and the highest bit of the network address must be "0".

The identification length of the network in the class An IP address is 8 bits, and the length of the host identification is 24 bits. The number of class A network addresses is relatively small, there are 126 networks, and each network can hold more than 16 million hosts.

2. Class B IP address

A Class B IP address means that in the four segments of the IP address, the first two numbers are network numbers. If the IP address is represented in binary, the class B IP address consists of a 2-byte network address and a 2-byte host address, and the highest bit of the network address must be "10".

The identification length of the network in the class B IP address is 16 bits, and the length of the host identity is 16 bits. The class B network address is suitable for medium-sized networks, there are 16384 networks, and each network can hold more than 60, 000 computers.

3. Class C IP address

A Class C IP address means that in the four segments of the IP address, the first three numbers are network numbers and the remaining numbers are those of the local computer.

If the IP address is represented in binary, the class C IP address consists of a 3-byte network address and a 1-byte host address, and the highest bit of the network address must be "110".

The identification length of network in class C IP address is 24 bits, and the length of host identification is 8 bits. There are more than 2.09 million networks in class C network address. Suitable for small-scale local area networks, each network can only contain up to 254 computers.

Extended data:

IP address refers to the Internet protocol address (English: Internet Protocol Address, also translated as Internet protocol address), which is the abbreviation of IP Address.

IP address is a unified address format provided by IP protocol, which assigns a logical address to every network and host on the Internet to shield the differences in physical addresses. There are also some ip agent software, but most of them charge for it.

Some other IP addresses:

1. Class D IP address:

Class D IP addresses have historically been called Multicast addresses (multicast address), or multicast addresses. In Ethernet, a multicast address names a group of sites that should receive a packet in this network.

The highest bit of a multicast address must be "1110", ranging from 224.0.0.0 to 239.255.255.255.

2. Special website:

(1) the address where each byte is 0 ("0.0.0.0") corresponds to the current host

(2) the IP address in which every byte of the IP address is 1 ("255.255.255.255") is the broadcast address of the current subnet.

(3) all class E IP addresses that begin with "11110" are reserved for future and experimental use.

(4) IP addresses cannot start with decimal "127s". The numbers 127.0.0.1 to 127.255.255.255 are used for loop testing. For example, 127.0.0.1 can represent the native IP address, and the Web server configured in this machine can be tested with "http://127.0.0.1"".

(5) the first 8-bit group of the network ID cannot be all set to "0", and the full "0" represents the local network.

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