312-38 Exam Dumps | Which of the following Wireshark filters allows an administrator to detect SYN/FIN DDoS attempt on the

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Question 6/146

Which of the following Wireshark filters allows an administrator to detect SYN/FIN DDoS attempt on the network?

A. tcp.flags==0x003

B. tcp.flags==0X029

C. TCP.flags==0x300

D. tcp.dstport==7

Correct Answer: B

The correct Wireshark filter to detect a SYN/FIN DDoS attempt is tcp.flags==0X029. This filter is designed to capture packets where both the SYN and FIN flags are set, which is an unusual combination and indicative of a SYN/FIN attack. In a typical three-way TCP handshake, the SYN and FIN flags are not set in the same TCP segment. A SYN flag is used to initiate a connection, and a FIN flag is used to politely close a connection. Therefore, seeing both flags set in the same packet suggests a possible SYN/FIN DDoS attack.
References: The answer is based on the standard behavior of TCP flags in network communications and the detection of anomalous flag combinations that signify potential DDoS attacks. While specific references to the EC-Council's Certified Network Defender (CND) course materials cannot be provided here, the explanation aligns with the general knowledge of network security practices and the use of Wireshark for network analysis.

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