CompTIA CompTIA Certifications JK0-023 Questions & Answers

• Question 101:

  On which of the following OSI model layers would a MAC address be used?

  A. Network

  B. Data Link

  C. Transport

  D. Physical

  Correct Answer: B

• Question 102:

  An unusual amount of actvity is coming into one of the switches in an IDF. A malware atack is suspected. Which of the following tools would appropriately diagnose the problem?

  A. Cable tester

  B. Protocol analyier

  C. Load balancer

  D. OTDR

  Correct Answer: B

• Question 103:

  Given a subnet mask of 255.255.255.0f how many usable IP addresses would be in that subnet?

  A. 250

  B. 254

  C. 255

  D. 256

  Correct Answer: B

• Question 104:

  A clientns computer is unable to access any network resources. Which of the following utlites can a technician use to determine the IP address of the clientns machine?

  A. ipconfg

  B. nslookup

  C. dig

  D. tracert

  Correct Answer: A

• Question 105:

  Several users are reportng connectvity issues with their laptops. Upon further investgatonf the network technician identfes that their laptops have been atacked from a specifc IP address outside of the network. Which of the following would need to be confgured to prevent any further atacks from that IP address?

  A. Port security

  B. IDS

  C. Firewall rules

  D. Switch VLAN assignments

  Correct Answer: C

• Question 106:

  The Network Interface Layer of the TCP/IP model corresponds to which of the following layers of the OSI model? (Select TWO).

  A. Network

  B. Session

  C. Transport

  D. Physical

  E. Data link

  Correct Answer: DE

• Question 107:

  Which of the following performs authentcaton and provides a secure connecton by using 3DES to encrypt all informaton between two systems?

  A. HTTPS

  B. SSH

  C. RSA

  D. SSL

  Correct Answer: B

• Question 108:

  A technicianf Joef visits a site that has reported a network down emergency. He immediately reboots the switches and the router since the network is down. Which of the following network troubleshootng methodology steps should Joe have performed FIRST?

  A. Determine if anything has changed

  B. Once a theory is confrmed determine the next step is to resolve the problem

  C. Implement the soluton or escalate as necessary

  D. Queston the obvious

  Correct Answer: A

• Question 109:

  Which of the following dynamic routng protocols selects routng paths based upon hop count?

  A. BGP

  B. RIP

  C. OSPF

  D. IGRP

  Correct Answer: B

• Question 110:

  Annf a technicianf installs a wireless router in a network closet in a large ofce. She then confgures all workstatons in various ofces on that foor to use the wireless connecton. Maximum connecton speed at each workstaton is 54 Mbps. Some users complain that their network connecton is very slow. Which of the following is MOST likely the problem?

  A. Workstatons were confgured with the wrong connecton speed on the wireless adapter.

  B. Users with a slow connecton are too far away from the wireless router.

  C. Users that cannot connect are confgured on the wrong channel.

  D. Wireless network SSID is incorrect.

  Correct Answer: B