LPIC3 303 Security Practice Test 2026 – Comprehensive All-in-One Guide for Exam Success!

The term that refers to existing scan techniques in Nmap is the Xmas Scan. This particular technique sends a TCP packet with the FIN, PSH, and URG flags set, which is unusual since most legitimate traffic does not have these flags set simultaneously. The primary purpose of using an Xmas Scan is to identify open ports on a target system based on the response (or lack thereof) to the unusual flag combination.

Additionally, the FIN Scan is another legitimate scanning technique used by Nmap. This method sends a TCP packet with only the FIN flag set. Typically, when an unsolicited FIN packet is sent to an open port, it should be ignored, while a closed port will respond with a RST (reset) packet. This behavior enables the detection of open versus closed ports without establishing a standard connection, aiding in stealthier reconnaissance.

Both the Xmas Scan and the FIN Scan are valid Nmap techniques used for port scanning and assessment of network security.