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CompTIA JK0-023 - Questions & Answers

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Question 1
Single choice

Which of the following ports is the default telnet port?

A.

20

B.

21

C.

22

D.

23

Question 2
Single choice

A bridge handles frames at which of the following layers of the OSI model?

A.

Network

B.

Session

C.

Transport

D.

Data Link

Question 3
Single choice

A company is about to install a second network connecton with a new ISP.

Which of the following routng protocols is the BEST choice?

A.

IS-IS

B.

BGP

C.

OSPF

D.

RIP

Question 4
Multiple choice

Which of the following layers of the OSI model maps to the Network Interface layer of the TCP stack? (Select TWO).

A.

Physical

B.

Session

C.

Data Link

D.

Network

E.

Transport

Question 5
Single choice

Which of the following is a reason to use dynamic DNS?

A.

The host IP address is not listed in the frewall.

B.

The host IP address is assigned by DHCP.

C.

Statc routes cannot be used on the host network.

D.

A third-party certfcate is being used.

Question 6
Single choice

Jeff a userf can no longer access the accountng fle sharef but others are stll able to access the share.

Which of the following would be the FIRST step in troubleshootng the issue?

A.

Notfy senior management of the issue.

B.

Develop a probable cause theory.

C.

Ask Jef if anything has changed on the system.

D.

Escalate the issue to the vendor.

Question 7
Single choice

A layer 3 switch can move packets between subnets based on which of the following criteria?

A.

802.1q tag

B.

Port

C.

Applicaton

D.

IP address

Question 8
Single choice

Which of the following ports should be allowed through a frewall to allow DNS resoluton to occur to an outside DNS server?

A.

20

B.

53

C.

80

D.

3389

Question 9
Single choice

Which of the following is a Class A private IP address?

A.

4.2.2.2

B.

10.1.1.45

C.

169.254.9.15

D.

192.168.0.100

Question 10
Single choice

Jeff a network technicianf is concerned about the environmental efects of power consumpton and heat from network resources. Limited space is also a concern.

Which of the following technologies should be implemented?

A.

Circuit switching

B.

Network address translaton

C.

Power over Ethernet

D.

Virtual servers

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