What type of connection does the server designate in passive mode FTP?

What type of connection does the server designate in passive mode FTP?

• A. A specific port
• B. A random port
• C. No connection at all
• D. The default port

Answer: (B)

In passive mode FTP, the server designates a random port for the data connection. This is a fundamental aspect of how passive mode works, differing from active mode, where the client listens on a specific port for data transfer. In passive mode, the client initiates both the control and data connections, which helps to navigate around firewalls and network address translation (NAT) issues. When a client connects to the FTP server in passive mode, it sends a request for the server to enter passive mode, and the server responds with an IP address and a randomly chosen port number where the client can connect to receive the data. This random port assignment ensures flexibility and avoids conflicts that might arise from static configurations. This approach allows users to more easily establish connections without needing to adjust firewall settings for specific ports, improving compatibility across different network environments.

In passive mode FTP, the server designates a random port for the data connection. This is a fundamental aspect of how passive mode works, differing from active mode, where the client listens on a specific port for data transfer. In passive mode, the client initiates both the control and data connections, which helps to navigate around firewalls and network address translation (NAT) issues.

When a client connects to the FTP server in passive mode, it sends a request for the server to enter passive mode, and the server responds with an IP address and a randomly chosen port number where the client can connect to receive the data. This random port assignment ensures flexibility and avoids conflicts that might arise from static configurations.

This approach allows users to more easily establish connections without needing to adjust firewall settings for specific ports, improving compatibility across different network environments.