Victor works as a professional Ethical Hacker for SecureEnet Inc.

Victor works as a professional Ethical Hacker for SecureEnet Inc. He wants to scan the wireless network 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?