200-301 · Question #1557
Which protocol should be used to transfer large files on a company intranet that allows TCP 20 and 21 through the firewall?
The correct answer is D. FTP. FTP is the appropriate protocol for transferring large files on a company intranet, as it is designed for this purpose and uses TCP ports 20 and 21, which are explicitly allowed.
Question
Which protocol should be used to transfer large files on a company intranet that allows TCP 20 and 21 through the firewall?
Options
- ASMTP
- BREST API
- CTFTP
- DFTP
How the community answered
(27 responses)- A4% (1)
- B7% (2)
- C19% (5)
- D70% (19)
Why each option
FTP is the appropriate protocol for transferring large files on a company intranet, as it is designed for this purpose and uses TCP ports 20 and 21, which are explicitly allowed.
SMTP (Simple Mail Transfer Protocol) is used for sending email messages and is not designed for general large file transfers between systems.
REST API is an architectural style for web services and not a dedicated file transfer protocol, although it can be used to facilitate file uploads/downloads.
TFTP (Trivial File Transfer Protocol) uses UDP, lacks security and robust features, and is generally used for smaller, simpler file transfers like device boot files.
FTP (File Transfer Protocol) is specifically designed for transferring files and utilizes TCP port 21 for control and TCP port 20 (or dynamic ports) for data, aligning with the firewall's allowed ports.
Concept tested: File transfer protocols and port numbers
Source: https://datatracker.ietf.org/doc/html/rfc959
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