Exam N10-007 topic 1 question 220 discussion

TFTP is often used to transfer boot files and "configuration files" It also uses UDP with authentication or security. E is the answer.

References: https://ipcisco.com/lesson/tftp-ftp-sftp-and-scp/ https://en.wikipedia.org/wiki/Secure_copy_protocol https://en.wikipedia.org/wiki/SSH_(Secure_Shell) https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol

A. UDP port 22 The IANA has assigned als UDP port 22 for SSH. B. TCP port 22 SCP - Secure copy protocol. is a means of securely transferring computer files between a local host and a remote host or between two remote hosts. Also SSH uses TCP port 22. Also SFTP is a file transfer protocol built upon the SSH (Secure Shell). It uses also port 22. C. TCP port 25 Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers. D. UDP port 53 DNS protocol. E. UDP port 69 Trivial File Transfer Protocol (TFTP). It is a simple lockstep File Transfer Protocol which allows a client to get a file from or put a file onto a remote host.

The correct answer is E. UDP port 69. TFTP is faster than SCP, SFTP because of UDP and no security. But it is not secure protocol - no encryption, no authentication.

https://www.auditmypc.com/udp-port-69.asp#:~:text=Side%20note%3A%20UDP%20port%2069%20uses%20the%20Datagram,computer%20to%20an%20application%20running%20in%20another%20computer.