Which of the following are the scanning methods used in penetration testing? Each correct answer represents a complete solution. Choose all that apply. 

Answer options:

A. Vulnerability
B. Port
C. Services
D. Network

responding hosts on the network and their corresponding IP addresses. Answer: C is incorrect. This option comes under vulnerability scanning.

The vulnerability, port, and network scanning tools are used in penetration testing. Vulnerability scanning is a process in which a Penetration Tester uses various tools to assess computers, computer systems, networks or applications for weaknesses. There are a number of types of vulnerability scanners available today, distinguished from one another by a focus on particular targets. While functionality varies between different types of vulnerability scanners, they share a common, core purpose of enumerating the vulnerabilities present in one or more targets. Vulnerability scanners are a core technology component of Vulnerability management. Port scanning is the first basic step to get the details of open ports on the target system. Port scanning is used to find a hackable server with a hole or vulnerability. A port is a medium of communication between two computers. Every service on a host is identified by a unique 16-bit number called a port. A port scanner is a piece of software designed to search a network host for open ports. This is often used by administrators to check the security of their networks and by hackers to identify running services on a host with the view to compromising it. Port scanning is used to find the open ports, so that it is possible to search exploits related to that service and application. Network scanning is a penetration testing activity in which a penetration tester or an attacker identifies active hosts on a network, either to attack them or to perform security assessment. A penetration tester uses various tools to identify all the live or