Written by 3:11 pm Servers

What is DHCP? How does the DHCP server work?

DHCP server

The DHCP server has changed the lives of all administrator forever. It has given them the commodity of automatic IP assignment. After the introduction of DHCP, there was no need for some IT specialists to spend countless hours providing IPs for every device connected to the network device. But how exactly does DHCP work? Let’s find out!

What is DHCP and DHCP server?

DHCP – Dynamic Host Configuration Protocol is a network management protocol that we use on TCP/IP network. The DHCP server, automatically assigns IP addresses and other network configurations, to the connected devices so they can exchange information. DHCP let the hosts get the necessary TCP/IP configuration data from the DHCP server.

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. They will just set up the DHCP server with all the additional network information, and it will do its work dynamically.

Benefits of DHCP

IP address configuration on which you can rely

DHCP makes very few errors regarding the IP address configuration. There might be some occasional errors related to the network typographic and IP conflicts when the DHCP server assigns the same IP to different devices.

Less work for the network administrators

There are few features that admins really like about it because it makes their job easier.

You can automate the TCP/IP configuration. This can be done from one central location, without the need to move to different devices.

Additional options. It can change various additional network settings.

DHCP handles IP address changes for some users, like the laptop owners. They need to connect and disconnect more often than a desktop PC. This is not a problem for the protocol.

Disadvantages of DHCP

The DHCP server doesn’t require authentication when providing a lease. That way, if there is not a firewall working, someone can get the data from the network.

Rogue DHCP server. If such a server gets connected to the network, it can start assigning IPs to the devices. These devices will share data with it, and their information can be seen by the server. It means that hackers can steal the data that way.


Now and then, there comes a technology that makes our lives easier. Maybe it is not so visible, and just a few people know that it exists, but the DHCP deserves our “thank you.”

It has its downsides, but the time it saves is far more valuable.

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Tags: , , , Last modified: December 2, 2020