DHCP Chinese called dynamic host configuration protocol, in a nutshell, it is a LAN network protocol, it is controlled by the server for a period of lP address range, client login server can automatically gets the distribution of the lP address and subnet mask, as a result, it can reduce the administrator's workload, avoid the user manual configuration address conflicts resulted from the network parameters, and its main function is to host dynamically assigned IP address and other information,
1, DHCP is divided into client and server mode:
Model: (1) server is mainly responsible for centralized management,
(2) the client mode: apply to the server configuration is put forward, the server returned to the corresponding configuration information according to the strategy,
2, there are three mechanisms for DHCP assigns IP addresses:
Automatic assignment of ways: (1) the DHCP server to host assigned a permanent IP address, the first time once the DHCP client successfully rented to an IP address from the DHCP server end, can use the permanent address,
(2) the method of dynamic allocation: the DHCP server to host specified with the IP address of the time limit, time to maturity or host made it clear that to give up the address, the address can be used by other host,
(3) the manual allocation: the client's IP address is specified by a network administrator, is to specify the IP address of the DHCP server to tell the client host,
It is important to note that the three kinds of address allocation, the only dynamic allocation can reuse the client no longer need to address, under the dynamic allocation, the DHCP client when no longer needed to give up the IP address, such as a DHCP client to normal closing, it can release the IP address for the DHCP server, and then the DHCP server can put the IP address assigned to apply for the IP address of the DHCP client,

Just contact the DHCP this concept, many places still puzzled, the definition of the above for baidu encyclopedia + some personal understanding, follow-up in the process of learning a new experience to supplement again,

CodePudding user response:

I don't think the DHCP as an agreement to look at, actually the DHCP is an application layer protocol, so it should be seen as a program, it is more easy to understand,