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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?
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Implement a solution for both causes to be sure all possibilities are covered.
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Choose the more likely cause and test to confirm.
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Establish a plan of action for each.
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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?
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Session
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Transport
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Physical
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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?
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25
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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?
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Layer 2
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Layer 5
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Layer 6
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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?
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16
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32
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48
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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?
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Session
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Application
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Network
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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?
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Test the theory to determine the cause.
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Implement the solution or escalate as necessary.
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Establish a plan of action to resolve the problem.
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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?
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Establish a theory of probable cause.
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Implement preventative measures.
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Verify full system functionality.
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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?
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20
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21
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22
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23
Answer: C
Question No: 130 – (Topic 1)
The APIPA address 169.254.10.123 falls into which of the following class of addresses?
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A
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B
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C
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D
Answer: B
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