What is the subnet mask for a Class C IP address?

The subnet mask of class c address is "255.255.255.0". Class C IP address refers to the four segments of the IP address. The first three segments are the network number, and the remaining segment is the number of the local computer. The default subnet mask of the Class C IP address is 255.255.255.0. The maximum number of hosts supported by the network is 256-2=254

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The IP address is a unified address format provided by the IP protocol. It assigns a logical address to each network and each host on the Internet to shield the differences in physical addresses.

The Internet Committee has defined 5 IP address types to suit networks of different capacities, namely Class A ~ Class E. Among them, categories A, B, and C3 (table below) are uniformly allocated globally by InternetNIC, and categories D and E are special addresses.

Let’s talk about Class C IP addresses.

Class C IP address

A Class C IP address means that among the four numbers in the IP address, the first three numbers are Network number, the remaining number is the number 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. The highest bit of the network address must be "110". The length of the network identifier in a Class C IP address is 24 bits, and the length of the host identifier is 8 bits. There are more Class C network addresses, with more than 2.09 million networks. Suitable for small-scale local area networks, each network can only contain up to 254 computers.

Address range

Class C IP addresses include private Class C addresses, and the address range is: 192.0.0.0~223.255.255.255. Class C addresses are allocated to small networks, such as general LANs and campus networks. The number of hosts that can be connected to it is the smallest, and the users to which it belongs are divided into several network segments for management. There are more than 2.09 million Class C networks, and each network can accommodate 254 hosts.

Class C networks use the first three sets of numbers to represent the network address, and the last set of numbers as the host address on the network. The default subnet mask of Class C address is 255.255.255.0, and the maximum number of hosts supported by each network is 256-2=254

"Network Load Balancing" is a Class C IP address Optional session support (in addition to support for a single IP address) is provided to accommodate customers using multiple proxy servers at their sites.

Public IP addresses are used on the Internet and are generally used for public communications. Private IP addresses are used by corporate users in internal networks, and private addresses cannot be used on the Internet.

Private addresses are on the Internet An address that is not used on the Internet but is used in the local area network. Private addresses include 3 groups, among which the private address range of Class C IP is: 192.168.0.0~192.168.255.255.

Extended knowledge:

Subnet mask is also called network mask, address mask, and subnet mask. It is used to specify an IP Which bits of the address identify the subnet the host is on, and which bits identify the host's bitmask. The subnet mask cannot exist alone, it must be used in conjunction with the IP address.

A subnet mask is a 32-bit address that is used to mask a part of the IP address to distinguish the network identification and the host identification, and to indicate whether the IP address is on a LAN or a WAN.

A subnet mask is a 32-bit address, a technology used in conjunction with an IP address. It has two main functions. One is to shield part of the IP address to distinguish the network identification and the host identification, and to indicate whether the IP address is on the local area network or on the remote network. The second is used to divide a large IP network into several small sub-networks.

Using subnets is to reduce the waste of IP. Because with the development of the Internet, more and more networks are created, some with hundreds of networks, and some with only a few. This wastes a lot of IP addresses, so subnets must be divided. Using subnets can improve the efficiency of network applications.

The method to determine whether two computers belong to the same network segment through the computer's subnet mask is to convert the computer's decimal IP address and subnet mask into binary form, and then perform binary AND ) calculation (all 1s result in 1, incomplete 1s result in 0), if the results are the same, then the two computers belong to the same network segment.

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