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Question 230 - H12-731_V2.0 discussion
The following describes port scanning Which is wrong? (single selection).
A.
TCP port scanning uses the three-way handshake feature
B.
The purpose of port scanning is to determine what kind of services are enabled on the peer host, so as to find an entry for intrusion.
C.
When the scanner sends a Syn message If the peer does not reply, the peer port is down.
D.
For UDP port scanning It is to determine whether the port is open by sending a UDP data packet to the peer with a specific port number and observing whether the ICMP port is unreachable packet.
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