The DHCP hears the call, and answer with an IP address, that it offers it to the newly connected device. This request will arrive to all of the devices, and the server will also get it. It will call over the network for a DHCP server. When you connect a new device, it still does not have an IP address. Imagine we have a network of connected devices and a DHCP server that manages the IP addresses. Manually the network administrator will assign the IP address to the client. This will prevent the running out of IPs. After the time expires, the client needs to ask for a new IP address again. The server auto-assigns IP addresses to clients, but there is a time period. The IP address will be designated for just one device, so if, in the future, many new devices get connected, the server could run out of IP addresses to give.
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This one will automatically assign an IP per client permanently. There are three ways that you can configure the DHCP server: It will listen for messages and pass them to the right place.
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The relay is in charge of communication between the DHCP server and the client. That is the time period that indicates how long a client can use the assigned IP address before it expires. If the network is divided into pieces, there will be so-called subnets. Usually, the server will auto-assign addresses, starting from the smallest number, and going to the highest. This is the range of IP addresses that the DHCP server can offer to the DHCP clients. It will request an IP address and communicate with the DHCP server to get it with the rest of the data and confirm the process. It must be present on the client devices (computer, mobile, IoT device, etc.). The server could be a computer or a part of the router. It will handle the communication with all the client devices. The server device is in charge of answering an IP address request, provide an available IP address, store it for the time of the lease and renew it later. And two devices can’t have the same IP because this will make them both unusable. The person behind the device does not need to make any configurations.Įvery device on a network needs the address as identification. The newly connected device will automatically ask for an IP address and get it. The client also does not need to do anything at all. It manages the pool of IP addresses automatically. Why is DHCP important?ĭHCP is important because it makes it really easy for network administrators to provide IP addresses to client devices on the network.
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They will just set up the DHCP server with all the additional network information, and it will do its work dynamically. Using this protocol, the network administrators, don’t need to set a static IP for each device, and later reassign it to another and keep an eye on all the available IPs. DHCP let the hosts get the necessary TCP/IP configuration data from the DHCP server. The DHCP server, automatically assigns IP addresses and other network configurations like subnet mask, default gateway, DNS server, and more to the connected devices so they can exchange information.