Which port does the DNS service mainly operate on?

The DNS (Domain Name System) service primarily operates on port 53. This port is designated for both the authoritative name servers (which provide responses to queries) and the clients that query these servers. When a user wants to access a website, their device sends a DNS request to a server on port 53 to resolve the human-readable domain name into an IP address, which is needed for routing traffic over the internet.

Port 80, on the other hand, is mainly used for HTTP web traffic, allowing users to view web pages. Port 25 is typically used for SMTP (Simple Mail Transfer Protocol) for sending emails. Port 110 is associated with the POP3 (Post Office Protocol) service, which is used by email clients to retrieve emails from a server. Therefore, understanding these different ports helps clarify the specific role of port 53 in the context of DNS services.