200-301 · Question #1054
What is the function of FTP?
The correct answer is D. Uses two separate connections for control and data traffic. FTP (File Transfer Protocol) operates by establishing two distinct TCP connections: one for control commands and another for the actual data transfer.
Question
What is the function of FTP?
Options
- AAlways operated without user connection validation
- BUses block number to identify and mitigate data-transfer errors
- CRelies on the well-known UDO port 69 for data transfer
- DUses two separate connections for control and data traffic
How the community answered
(15 responses)- B7% (1)
- D93% (14)
Why each option
FTP (File Transfer Protocol) operates by establishing two distinct TCP connections: one for control commands and another for the actual data transfer.
FTP requires user authentication (username and password) for connection validation unless explicitly configured for anonymous FTP, making 'always operated without user connection validation' incorrect.
This describes a characteristic of TFTP (Trivial File Transfer Protocol), which uses block numbers for error detection and retransmission over UDP, not FTP.
FTP uses well-known TCP ports 20 and 21, not UDP port 69, which is associated with TFTP.
FTP (File Transfer Protocol) uniquely utilizes two separate TCP connections: one for control information (commands and responses, on TCP port 21) and another for the actual data transfer (on TCP port 20 for active mode, or an ephemeral port for passive mode). This separation allows for commands to be issued while data transfer is in progress.
Concept tested: FTP connection characteristics
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/standard-ports-ftp-service
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