DHCP

The Basics

DHCP (Dynamic Configuration Protocol) is a service that automatically provides IP numbers to the computer that requested it. Computers that provide IP number is referred to as DHCP server, while the computer that requested the IP number is referred to as a DHCP Client. Thus, administrators no longer have to manually give the IP number when the configuration of TCP / IP, but enough to give a reference to the DHCP Server.

At the time of the DHCP client is turned on, the computer is doing the request to the DHCP-Server to get IP numbers. DHCP provides IP numbers to answer to that is in the DHCP database. DHCP server after a given IP number, then lend server (lease) to number of existing IP, DHCP Client, and expunge the IP number from the list of pool. IP number is given along with the subnet mask and default gateway. If there is no IP numbers that can be given, then the client can not initialize TCP / IP, by itself can not be connected to the network.

After a certain period of time, the use of DHCP Client is set selesaidan client does not renew the request again, the IP number is returned to the DHCP server, and server to give IP numbers to the client in need. Long periods can be specified in minutes, hours, months or forever. The period referred to leased period.
Understanding DHCP

DHCP stands for Dynamic Host Configuration Potocol, a perogram
application that enables network settings centrally from the server,
so that the PC client does not need to configure IP addresses. Because all
been addressed by the PC Server.

Advantages

Use DHCP from the System Administrator, is that we do not
have recorded the IP addresses on each client PC. May
to the needs of up to 10 or 20 client PCs can we handle,
but if the clients we handle up to 50 or 100, you can
imagine how complicated and exhausting work that we have signed.

The main purpose of the use of Dynamic Host Configuration Protocol is to provide centralized IP address setting through a server rather than having to individually configure each client machine. A client machine is configured to use DHCP can not set a static IP address by itself, everything is set and determined by the specified DHCP server.

One way of using DHCP is to identify in advance the hardware address of each network card (MAC Address, this address is usually fixed) and then give the client the IP address settings are identical each time they connect to the server.

Also to the configuration of DHCP so the DHCP server to provide IP addresses dynamically to the host that is connected to it, using the IP address range that has been determined. In this case the DHCP server will try to give the same address on the client machine whenever the host is requesting the address to the server (although for a long time).

This of course does not work properly, if the network is more than the host computer at the address prepared by the server.

MERIT

With these advantages, DHCP makes network administrators to work more easily. Each time a change is associated with the addressing and configuration of the global network, can be implemented in centralized to only make changes to the configuration file on the server.

This is of course more efficient than you have to make settings or setup on every host (client machines). Besides, it is very easy for us to integrate the machines (hosts), especially the new machine into the network because the machines will get the address of the polling done on the server address.

A DHCP server is not only the IP address and its netmask, but also provide a host name (host name), domain name, gateway, and name server (DNS) used by the client machine. DHCP can also have some other parameters such as the use of time server that can be accessed by each client.