Which Wireshark filter is used to view packets with FIN, PSH, and URG TCP flags for detecting Xmas scan attempts?

The filter used to view packets with FIN, PSH, and URG TCP flags, specifically for detecting Xmas scan attempts, utilizes the bitmask that corresponds to those flags. The FIN, PSH, and URG flags in the TCP header can be represented as bit values; when they are combined, they create a specific hexadecimal value.

In this context, the FIN flag is represented as 0x01, the PSH flag as 0x08, and the URG flag as 0x20. When these flags are summed together, they yield the hexadecimal value 0x29. Therefore, the correct filter to capture packets that have all three of these flags set is represented as tcp.flags==0x029.

This choice effectively allows analysts to filter and analyze the traffic that matches the characteristics of an Xmas scan, a type of port scanning technique used to probe for open ports and map network services. The other options focus on either different port numbers or an incorrect flag combination, which would not effectively identify the Xmas scan traffic.