A security tester needs to verify if a remote port that relies on a handshake is open. Which technique is the best for confirming that the service is active?
A broadcast-based method that checks for responses from all devices
A sequence that sends a partial request and interprets an unreachable message as a closed port
An approach that completes all steps in the connection sequence to confirm the service is active
A minimal approach that avoids handshake signals and times out to identify open ports
Completing all aspects of the connection sequence verifies that the service truly accepts inbound requests. A partial request that waits for an unreachable message does not confirm whether the service actually accepts the connection. Broadcast queries locate responding devices but do not validate handshake-based ports. A minimal approach that times out can identify suspects but does not confirm a handshake.
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What is meant by completing all steps in a connection sequence?
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How does the method of sending a partial request differ from completing the full handshake?
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Why is a broadcast-based method not effective for handshake-based ports?