You are attempting to run an Nmap port scan on a web server. Which of the following commands would result in a scan of common ports with the least amount of noise in order to evade IDS?

The -A flag enables aggressive scanning (OS detection, version detection, script scanning, and traceroute), generating a high volume of distinctive traffic that is easily flagged by IDS.

The -T5 (insane) timing template sends packets as fast as possible, and scanning all 65535 ports produces a massive, easily detectable traffic spike.

The -sT flag performs a full TCP connect scan and -O enables OS detection, but the critical factor is -T0 (paranoid timing), which introduces up to a 5-minute delay between probes. This extreme slowness prevents IDS signature correlation of packets into a recognizable scan, making it the stealthiest option among the choices provided.

The -A flag still enables aggressive multi-probe scanning features, and while -T1 (sneaky) slows timing, the diverse probe types generated by aggressive mode remain detectable.