CompTIA CySA+ (CS0-001) — Question 113

A cybersecurity professional wants to determine if a web server is running on a remote host with the IP address 192.168.1.100. Which of the following can be used to perform this task?

Answer options

• A. nc 192.168.1.100 -1 80
• B. ps aux 192.168.1.100
• C. nmap 192.168.1.100 ""p 80 ""A
• D. dig www 192.168.1.100
• E. ping ""p 80 192.168.1.100

Correct answer: C

Explanation

The correct answer is C because nmap is a powerful network scanning tool that can be used to identify if a specific port, such as port 80 for HTTP, is open on a target IP address. Option A is incorrect as the syntax is wrong for netcat, B is not applicable since ps aux is used for listing processes on the local machine, D is unrelated to checking for a web server, and E is invalid as ping does not test specific ports.