A penetration tester ran an Nmap scan on an Internet-facing network device with the -F option and found a few open ports. To further enumerate, the tester ran another scan using the following command: nmap -O -A -sS -p- 100.100.100.50
Nmap returned that all 65,535 ports were filtered
Which of the following MOST likely occurred on the second scan?
- A firewall or IPS blocked the scan.
- The penetration tester used unsupported flags.
- The edge network device was disconnected.
- The scan returned ICMP echo replies.
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