Practice Quiz

LPI Certification / CompTIA Linux+ Practice Test

Category - LINUX

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Jack wants to use a command at the shell prompt to scan his Linux system to determine what services are currently running on it. The IP address of the system is 192.168.10.10. Which of the following commands should he use?
  1. scan 192.168.10.10 -TCP
  2. scan 192.168.10.10 -UDP
  3. nmap 192.168.10.10 -scan
  4. nmap -sT 192.168.10.10
Explanation
Answer - D - Jack should use the nmap -sT 192.168.10.10 command to determine the services that are currently running on his Linux system.

Key Takeaway: The nmap tool can be used to scan the open TCP and UDP ports on a system. It can also be used to test the firewall rules. It uses raw IP packets to determine the hosts on the network, the services running on these hosts, the OS version used by these hosts, and the firewalls used by these hosts. The nmap -sT <host IP> command scans for open TCP ports and the nmap -sU <host IP> command scans for open UDP ports.
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