Which action would you use in a rule to disallow connection silently? (a) Accept (b) Drop (c) Reject (d) Forward

Answer:

In a rule to disallow connection silently, the action you would use is "Drop" (b).

Explanation:

When you use the "Drop" action in a rule, it means that any incoming connection matching the rule will be silently discarded or ignored. The connection will not receive any response or acknowledgement that it has been dropped. This can be useful in scenarios where you want to block unwanted or malicious traffic without alerting the sender.

For example, let's say you have a firewall configured with a rule that drops all incoming connections from a specific IP address. If a connection attempt is made from that IP address, the firewall will simply drop the connection without sending any response back. The sender will not receive any indication that the connection was dropped, which can help protect your network from potential threats.

It's important to note that the "Drop" action differs from the "Reject" (c) action. While "Drop" silently discards the connection, "Reject" sends a response back to the sender indicating that the connection has been rejected. This can be useful in situations where you want to inform the sender that their connection was not allowed.

In summary, the "Drop" action in a rule is used to disallow connection silently. It silently discards incoming connections without sending any response back to the sender.