CompTIA CompTIA Certifications LX0-104 Questions & Answers

• Question 51:

  Which of the following statements is valid in the file /etc/nsswitch.conf?

  A. multi on

  B. 192.168.168.4 dns-server

  C. hosts: files dns

  D. include /etc/nsswitch.d/

  Correct Answer: C

• Question 52:

  Which command, depending on its options, can display the open network connections, the routing tables, as well as network interface statistics. (Specify ONLY the command without any path or parameters.)

  A. netstat -or- /bin/netstat -or- ss -or- /usr/bin/ss

  Correct Answer: A

• Question 53:

  Which port is the default server port for the HTTPS protocol? (Specify the port number using digits.)

  A. 443

  Correct Answer: A

• Question 54:

  Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)

  A. 127.0.0.0/8

  B. 10.0.0.0/8

  C. 169.255.0.0/16

  D. 172.16.0.0/12

  E. 192.168.0.0/16

  Correct Answer: BDE

• Question 55:

  Which of the following tools used for DNS debugging, reports not only the response from the name server but also details about the query?

  A. dnsq

  B. dig

  C. hostname

  D. dnslookup

  E. zoneinfo

  Correct Answer: B

• Question 56:

  What of the following can be done by the command ifconfig? (Choose TWO correct answers.)

  A. Set a network interface active or inactive.

  B. Specify the kernel module to be used with a network interface.

  C. Allow regular users to change the network configuration of a network interface.

  D. Change the netmask used on a network interface.

  E. Specify which network services are available on a network interface.

  Correct Answer: AD

• Question 57:

  Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)

  A. New name servers may be added to the resolver configuration.

  B. Network interfaces may become active or inactive.

  C. The routing table may change.

  D. IP addresses may change.

  E. The system's host name may change.

  Correct Answer: BCD

• Question 58:

  What is true regarding TCP port 23?

  A. Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.

  B. Port 23 is the well known port for the SSH service which provides secure logins.

  C. Port 23 is the well known port for the rlogin service which is SSL secured by default.

  D. Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.

  Correct Answer: A

• Question 59:

  How many IP-addresses can be used for unique hosts inside the IPv4 subnet 192.168.2.128/28? (Specify the number only without any additional information.)

  Correct Answer: A

• Question 60:

  Which parameter must be passed to ifconfig to activate a previously inactive network interface? (Specify the parameter only without any command, path or additional options)

  A. up

  Correct Answer: A