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2018 Aug CompTIA Official New Released JK0-023
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CompTIA Network certification

Question No: 121 – (Topic 1)

A technician has narrowed down the cause of a problem to two possible sources. Which of the following should the technician do NEXT?

1. Implement a solution for both causes to be sure all possibilities are covered.

2. Choose the more likely cause and test to confirm.

3. Establish a plan of action for each.

4. Choose the less likely cause and test to eliminate.

Answer: B

Question No: 122 – (Topic 1)

Which of the following OSI layers performs error detection using a Frame Check Sequence?

1. Session

2. Transport

3. Physical

4. Data link

Answer: D

Question No: 123 – (Topic 1)

An administrator notices SMTP traffic is being blocked by the company firewall. Which of the following ports should be opened?

1. 25

2. 53 C. 110 D. 443

Answer: A

Question No: 124 – (Topic 1)

The application layer in the TCP/IP model is comparable to which of the following layers in the OSI model?

1. Layer 2

2. Layer 5

3. Layer 6

4. Layer 7

Answer: D

Question No: 125 – (Topic 1)

Which of the following is the usual number of bits for the host identifier part of an IPv6 address?

1. 16

2. 32

3. 48

4. 64

Answer: D

Question No: 126 – (Topic 1)

A crossover cable is MOST commonly associated with which of the following layers of the OSI model?

1. Session

2. Application

3. Network

4. Physical

Answer: D

Question No: 127 – (Topic 1)

A user is having difficulty connecting a laptop to the company’s network via a wireless connection. The user can connect to the network via a wired NIC. The technician thinks the user’s wireless NIC has failed. Which of the following network troubleshooting methodology

steps should the technician perform NEXT?

1. Test the theory to determine the cause.

2. Implement the solution or escalate as necessary.

3. Establish a plan of action to resolve the problem.

4. Re-establish new theory or escalate.

Answer: A

Question No: 128 – (Topic 1)

After Kurt, a technician, has established a plan of action to resolve the problem, which of the following steps should he perform NEXT?

1. Establish a theory of probable cause.

2. Implement preventative measures.

3. Verify full system functionality.

4. Implement the solution or escalate as necessary.

Answer: D

Question No: 129 – (Topic 1)

Which of the following ports would Zach, a technician, need to open on a firewall to allow SSH on the default port?

1. 20

2. 21

3. 22

4. 23

Answer: C

Question No: 130 – (Topic 1)

The APIPA address 169.254.10.123 falls into which of the following class of addresses?

1. A

2. B

3. C

4. D

Answer: B

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