During a red team assessment, a CEH is given a task to perform network scanning on the target network without revealing its IP address. They are also required to find an open port and the services…

The SCTP INIT scan (`-sY`) is a specific scan type for the SCTP protocol, not primarily designed for concealing the attacker's IP address.

UDP scan (`-sU`) is used to find open UDP ports and services but does not inherently hide the attacker's IP address; it directly sends packets from the scanner's IP.

The ACK flag probe scan (`-sA`) is used to map firewall rulesets and determine if a port is filtered or unfiltered, not to determine if a port is open or to conceal the attacker's IP address.

The IDLE scan, using the `-sI` command in Nmap/Zenmap, is a highly stealthy scanning technique that allows an attacker to port scan a target without sending any packets from their own IP address. It spoofs the source IP address by leveraging a 'zombie host' to indirectly probe the target, thereby concealing the attacker's identity while still determining open ports and services.