Which protocol uses port 53 for its operations?

Port 53 is designated for the Domain Name System (DNS) protocol, which is essential for translating human-readable domain names into IP addresses that computers use to communicate over the Internet. This functionality is crucial because it enables users to access websites using easily memorable names instead of numerical addresses. DNS queries and responses utilize this port for the communication necessary to resolve these names.

The basis of this protocol's operation on port 53 is critical to the overall functionality of the Internet, as it allows for the efficient location of services tied to domain names. For example, when a user enters a URL into their browser, a DNS query is made to resolve the domain name to its corresponding IP address, facilitating the connection to the desired website.

The other protocols mentioned operate on different ports. DHCP operates on ports 67 and 68, SMTP uses port 25 for email transmission, and HTTP typically uses port 80 for web traffic. Each of these serves different functions in network communication, distinct from the role of DNS.