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Dynamic Host Configuration Protocol (DHCP) enables users to dynamically and transparently assign reusable IP addresses to clients.

Domain Name System (DNS) is the system in the Internet that maps names of objects (usually host names) into IP numbers or other resource record values. The namespace of the Internet is divided into domains, and the responsibility for managing names within each domain is delegated, typically to systems within each domain.

DHCP and DNS are both created to make it easy for us to use networks or the Internet. However, they are totally two different technologies in actual applications. The DHCP is a protocol that helps us to assign an IP address and related IP information to the computer in the network. Many network switches also apply DHCP to provide valuable TCP/IP network services, for example, it helps to automatically upgrade software on client systems. Whereas the DNS is used to convert a website name or url to its IP address and vice versa. This is to ensure that our computer can find the right site because a computer can only find a site through its IP address, rather than its domain name.

DHCP servers assigns the IP addresses to client computers, while DNS servers resolve them. They are two essential technology developed for us to use the network or Internet conveniently. In addition, both DHCP and DNS are essential tools in the network administrator’s toolkit for managing all the IP devices on a corporate network.