Exam XK0-005 topic 1 question 110 discussion

Actual exam question from CompTIA's XK0-005

Question #: 110
Topic #: 1

A systems administrator is receiving tickets from users who cannot reach the application app that should be listening on port 9443/tcp on a Linux server.
To troubleshoot the issue, the systems administrator runs netstat and receives the following output:

Based on the information above, which of the following is causing the issue?

A. The IP address 0.0.0.0 is not valid.
B. The application is listening on the loopback interface.
C. The application is listening on port 1234.
D. The application is not running.

Show Suggested Answer

Suggested Answer: B 🗳️

by Ckl22 at Dec. 24, 2022, 1:44 p.m.

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tony12345

Highly Voted 9 months, 1 week ago

B because longest answer

upvoted 7 times

ajna_

7 months, 2 weeks ago

lol...

upvoted 1 times

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linux_admin

Most Recent 1 year, 4 months ago

Selected Answer: B

Based on the output of netstat, the issue is that the application is listening on the loopback interface (127.0.0.1) rather than on a publicly accessible IP address. The netstat output shows that the application is bound to the IP address 127.0.0.1 on port 9443, which means that it is only accessible from the same system (localhost). The 0.0.0.0:* field in the output indicates that the application is listening on all available network interfaces, but the IP address 0.0.0.0 does not actually represent a valid IP address. To resolve the issue, the application needs to be reconfigured to listen on a publicly accessible IP address, such as the IP address of the system's network interface that is reachable from the users' network.

upvoted 3 times

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Ckl22

1 year, 6 months ago

Selected Answer: B

Answer is B. The server is in a "Listen" state on port 9943 using its loopback address. The "1234" is a process-id

upvoted 2 times

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