CompTIA CompTIA Certifications JK0-023 Questions & Answers

• Question 981:

  Which of the following assists a network administrator in reverse engineering malware and viruses?

  A. Virtual switches

  B. Virtual machines

  C. VLANs

  D. IDS

  Correct Answer: B

• Question 982:

  Which of the following is a public class C IP address?

  A. 4.2.2.2

  B. 194.178.12.54

  C. 175.35.46.60

  D. 192.168.1.34

  Correct Answer: B

• Question 983:

  Which of the following uses types and codes rather than ports?

  A. EIGRP

  B. ICMP

  C. UDP

  D. IPv6

  Correct Answer: B

• Question 984:

  Which of the following is considered a routng metric?

  A. Hop count

  B. QoS

  C. Subnet siie

  D. IP address

  Correct Answer: A

• Question 985:

  At which of the following layers of the OSI model do packets exist?

  A. Network

  B. Session

  C. Data Link

  D. Transport

  Correct Answer: A

• Question 986:

  A network technician has determined a managed network switch has failed. The technician knows how to install a new switchf but not how to properly confgure it. Which of the following troubleshootng steps should the technician take NEXT?

  A. Escalate the problem

  B. Identfy potental efects

  C. Test the theory to determine cause

  D. Establish a plan of acton to resolve the problem

  Correct Answer: A

• Question 987:

  Which of the following records allows for reverse DNS lookups?

  A. AAAA

  B. A

  C. PTR

  D. CNAME

  Correct Answer: C

• Question 988:

  A user is unable to open up websites on the Internet from a browser. The administrator determines that the workstaton can ping its local gatewayf but not the remote web server. At which of the following layers of the OSI model does the problem MOST likely exist?

  A. Data link

  B. Network

  C. Session

  D. Physical

  Correct Answer: B

• Question 989:

  Which of the following protocols is the BEST choice for retrieving email on multple devices?

  A. IMAP4

  B. SMTP

  C. FTP

  D. SNMPv3

  Correct Answer: A

• Question 990:

  An administrator has set up a NIPS and connected it to the same switch as the internal frewall interface and the internal router. The devicef howeverf only detects trafc from itself to the frewall or router. Which of the following explains why additonal corporate trafc cannot be detected?

  A. The spanning tree protocol is preventng the trafc.

  B. Port Mirroring is set up incorrectly.

  C. The switch needs to be a layer 3 switch.

  D. The trafc is in a classless IP range and not classful IP range.

  Correct Answer: B