What protocol uses port 22 to provide secure, encrypted access to a remote computer?

The correct answer, Secure Shell (SSH), is widely recognized for using port 22 to establish a secure and encrypted connection for communication between a client and a server. SSH replaces older protocols like Telnet to provide a more secure method of accessing and managing remote systems. It employs strong encryption algorithms to protect data during transmission, making it essential for administrative tasks and secure file transfers over unsecured networks.

In contrast, Dynamic Host Configuration Protocol (DHCP) operates on port 67 (for servers) and port 68 (for clients) to dynamically assign IP addresses to devices on a network. Post Office Protocol 3 (POP3) is used for email retrieval and operates on port 110, while Domain Name System (DNS) translates domain names into IP addresses and typically uses port 53. Each of these protocols serves different networking purposes and does not ensure secure remote access like SSH does.