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What is the proper response for a NULL scan if the port is closed?
What is the proper response for a NULL scan if the port is closed?
A . SYN
B . ACK
C . FIN
D . PSH
E . RST
F . No response
Answer: E
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The expected result of a Null Scan on an open port is no response. Since there are no flags set, the target will not know how to handle the request. It will discard the packet and no reply will be sent. If the port is closed, the target will send an RST packet in response.