Which tool, command or service allows a remote or local user to find any open connection paths to the system on the Internet or an intranet?
A.
Traceroute
B.
Whois
C.
Nslookup
D.
Port scanner
Explanation:
A port scanner is used to identify active ports which are open.
Incorrect Answers:
A: Traceroute is used to identify the hops to a target host, and is used for mapping the structure of the network.
B: Whois is used to get primary and secondary DNS server information.
C: NSLOOKUP is used to query a DNS server.