What is the difference between "Block" and "Reset" actions in security policies?

The correct choice highlights the distinction between the "Block" and "Reset" actions within security policies. When a session is marked for "Block," the traffic associated with that session is denied outright. This means that any packets belonging to that session will not be allowed to pass through the firewall, preventing the communication from continuing.

On the other hand, the "Reset" action goes a step further by actively terminating the session. When a session is reset, not only is the traffic denied, but a TCP reset packet is sent back to both endpoints to inform them that the connection is no longer valid. This action effectively ends the session immediately and ensures that both parties are made aware that their previous connection was interrupted.

Understanding this difference is crucial for network security professionals as it influences how they respond to threats. While both actions deny traffic, the way they handle existing sessions and the notifications sent back differ significantly.