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A DNS server is a computer system that stores the mapping of domain names to IP addresses. When you type a domain name into your browser, the DNS server finds the IP address associated with that domain name.

DNS servers are essential for the proper functioning of the Internet. Without DNS, your computer would be unable to locate websites or email addresses.

In addition, DNS servers can help you troubleshoot network problems.

A DNS server receives requests from computers on the network and forwards them to the correct server. The DNS server also keeps track of the IP addresses that are associated with domain names.

When a computer requests a website, the DNS server looks up the domain name in its database and sends the request to the IP address that is associated with that domain name.

A DNS server can be configured to use a variety of protocols, including DHCP, PPP, and ARP. In addition, a DNS server can be used to update the IP addresses of computers on the network.