Answer: Operating system
Step-by-step explanation:
N map stand for the network mapper and it is the network security tool in the open source. It is basically used to design the large network and also use to scan the particular single host in the network system.
The network mapper basically use the IP packets for detecting the particular host in the network. Then, the host provided various type of services in the operating system.
N-map basically used in the security audit by the various network administrators to identify the given string.