CompTIA CompTIA Certifications JK0-023 Questions & Answers

• Question 1061:

  A technician has spent most of the day replacing a server running DHCP. Some of the users have begun to call the help desk statng that Internet connecton stopped working even afer rebootng. Upon investgatonf the usersn PCs with issues all have IP addresses that start with 169.254.x.x. The technician completes the replacement and powers on the new DHCP server. Which of the following is the BEST way to provide the PCs with issues a new IP address?

  A. Statcally assign a legitmate IP addressf and then set the PCsn NICs to DHCP

  B. Inform each user to replace 169.254 with 192.168

  C. Wait fve minutes untl the PC resends a DHCP request

  D. Run netstat on each PC and then reboot into safe mode

  Correct Answer: C

• Question 1062:

  A company has been given a Class C address to be utliied for all devices. The company has several subnets and the largest subnet has 15 hosts. Which of the following represents the MINIMUM CIDR notaton of this subnet mask?

  A. /26

  B. /27

  C. /28 D. /29

  Correct Answer: B

• Question 1063:

  Which of the following layers of the OSI model make up the Network Interface layer of the TCP/IP model? (Select TWO).

  A. Applicaton

  B. Physical

  C. Presentaton

  D. Transport

  E. Data Link

  F. Network

  Correct Answer: BE

• Question 1064:

  Hubs are diferentated from switches in that between the twof only hubs have:

  A. A single collision domain.

  B. A single broadcast domain.

  C. Multple collision domains.

  D. Multple broadcast domains.

  Correct Answer: A

• Question 1065:

  A home user states during a basement remodelf one of the workers cut the network cable that goes from the modem to the WAP and nothing else has changed. According to the network troubleshootng methodologyf which of the following is the NEXT step?

  A. Identfy the problem

  B. Queston the user

  C. Establish a plan of acton

  D. Establish a theory of probable cause

  Correct Answer: C

• Question 1066:

  At which of the following layers of the OSI model does ASCII work?

  A. Session

  B. Transport

  C. Presentaton

  D. Applicaton

  Correct Answer: C

• Question 1067:

  Which of the following reside at a minimum of Layer 3 of the OSI model? (Select TWO).

  A. Hub

  B. Switch

  C. MAC address

  D. IP address

  E. Router

  Correct Answer: DE

• Question 1068:

  Joe has a small ofce and is looking to replace his phone system with a lower cost soluton that requires minimal in-house support. Which of the following is the BEST choice?

  A. Wide Area Network

  B. NAT

  C. Virtual PBX

  D. Virtual LAN

  Correct Answer: C

• Question 1069:

  The BEST way to determine the next hop of a packet is to check the:

  A. link state

  B. routng table

  C. routng metrics

  D. convergence

  Correct Answer: B

• Question 1070:

  A user is having difculty connectng a laptop to the companyns network via a wireless connecton. The user can connect to the network via a wired NIC. The technician thinks the userns wireless NIC has failed. Which of the following network troubleshootng methodology steps should the technician perform NEXT?

  A. Test the theory to determine the cause.

  B. Implement the soluton or escalate as necessary.

  C. Establish a plan of acton to resolve the problem.

  D. Re-establish new theory or escalate.

  Correct Answer: A