Cisco CCNA (200-301)IP ServicesMedium
A network administrator is managing several Cisco devices and wants to ensure that all devices have their configurations backed up nightly to a central server using TFTP. Which protocol does TFTP use for transport, and what is its default port number?
- AUDP, Port 21
- BTCP, Port 69
- CTCP, Port 21
- DUDP, Port 69
Show answer & explanationAnswer & explanation
Correct answer: D. UDP, Port 69
TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol that uses UDP (User Datagram Protocol) as its transport layer protocol, and its default port number is 69.
Why the other options are wrong
- A. UDP is correct, but Port 21 is for FTP, not TFTP.
- B. TFTP uses UDP, not TCP.
- C. TCP Port 21 is used by FTP (File Transfer Protocol), not TFTP.
TFTP Protocol and Port
Trivial File Transfer Protocol (TFTP) is a simple protocol for transferring files, known for its use of UDP and default port.
- Uses UDP for transport, making it connectionless and unreliable.
- Default port number is 69.
- Often used for booting diskless workstations or transferring configuration files in network devices.
- Lacks security features like authentication or encryption.
Memory trick: TFTP is UDP 69, simple and quick, no TCP for this trick.