Final answer:
The correct answer is d) Enumerating.
Step-by-step explanation:
The correct answer is d) Enumerating. Enumerating is another name used by hackers for port scanning. Port scanning is the process of sending requests to target devices on a network to check which ports are open and what services are running on those ports. By enumerating ports, hackers can gather information about potential vulnerabilities and weaknesses in a network's security.