An IT administrator received an assignment with the following objectives:
Conduct a total scan within the company's network for all connected hosts.
Detect all the types of operating systems running on all devices.
Discover all services offered by hosts on the network.
Find open ports and detect security risks.
Which of the following command-line tools can be used to achieve these objectives?


A. nmap
B. arp
C. netstat
D. tcpdump