Victor works as a professional Ethical Hacker for SecureEnet Inc. He wants to scan the wirelessnetwork of the company. He uses a tool that is a free open-source utility for network exploration. The to

Victor works as a professional Ethical Hacker for SecureEnet Inc. He wants to scan the wirelessnetwork of the company. He uses a tool that is a free open-source utility for network exploration. The tool uses raw IP packets to determine the following:

• What ports are open on our network systems.
• What hosts are available on the network.
• Identify unauthorized wireless access points.
• What services (application name and version) those hosts are offering.
• What operating systems (and OS versions) they are running.
• What type of packet filters/firewalls are in use.

Which of the following tools is Victor using?