Which port number is associated with TFTP?

Which port number is associated with TFTP?

• A. 69
• B. 80
• C. 443
• D. 21

Answer: (A)

TFTP is a tiny file transfer protocol that runs over UDP, designed for simple, lightweight transfers. The client sends its read or write request to the server’s well-known port, which is 69. The server then responds (often from the same port) and the actual data transfer may occur over a separate ephemeral port chosen for that session. So the port most commonly associated with TFTP is 69. By contrast, port 80 is used for HTTP, port 443 for HTTPS, and port 21 for FTP control, which is why those ports don’t apply to TFTP.

TFTP is a tiny file transfer protocol that runs over UDP, designed for simple, lightweight transfers. The client sends its read or write request to the server’s well-known port, which is 69. The server then responds (often from the same port) and the actual data transfer may occur over a separate ephemeral port chosen for that session. So the port most commonly associated with TFTP is 69. By contrast, port 80 is used for HTTP, port 443 for HTTPS, and port 21 for FTP control, which is why those ports don’t apply to TFTP.