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LPI 202-450 Exam
Linux Professional Institute (Page 3 )

Updated On: 1-Feb-2026
Page 3 of 25
PDF with 120 Questions

What option in the sshd configuration file instructs sshd to permit only specific user names to log in to a system? (Specify ONLY the option name without any values.)

  1. sshd_config

Answer(s): A


Reference:

https://www.ssh.com/ssh/sshd_config/



What is the standard port used by OpenVPN?

  1. 1723
  2. 4500
  3. 500
  4. 1194

Answer(s): D


Reference:

https://openvpn.net/archive/openvpn-users/2006-04/msg00355.html



To allow X connections to be forwarded from or through an SSH server, what configuration keyword must be set to yes in the sshd configuration file?

  1. AllowForwarding
  2. ForwardingAllow
  3. XllForwardingAllow
  4. XllForwarding

Answer(s): D


Reference:

https://help.ubuntu.com/community/SSH/OpenSSH/Configuring



For what purpose is TCP/IP stack fingerprinting used by nmap?

  1. It is used to determine the remote operating system.
  2. It is used to filter out responses from specific servers.
  3. It is used to identify duplicate responses from the same remote server.
  4. It is used to masquerade the responses of remote servers.
  5. It is used to uniquely identify servers on the network for forensics.

Answer(s): A


Reference:

https://nmap.org/nmap-fingerprinting-old.html



Which of the following information has to be submitted to a certification authority in order to request a web server certificate?

  1. The web server’s private key.
  2. The IP address of the web server.
  3. The list of ciphers supported by the web server.
  4. The web server’s SSL configuration file.
  5. The certificate signing request.

Answer(s): E


Reference:

https://help.ubuntu.com/lts/serverguide/certificates-and-security.html.en



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