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Question 112 - XK0-005 discussion

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Users have been unable to reach www.comptia.org from a Linux server. A systems administrator is troubleshooting the issue and does the following:

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

A.
The name www.comptia.org does not point to a valid IP address.
Answers
A.
The name www.comptia.org does not point to a valid IP address.
B.
The server 192.168.168.53 is unreachable.
Answers
B.
The server 192.168.168.53 is unreachable.
C.
No default route is set on the server.
Answers
C.
No default route is set on the server.
D.
The network interface eth0 is disconnected.
Answers
D.
The network interface eth0 is disconnected.
Suggested answer: B

Explanation:

The issue is caused by the server 192.168.168.53 being unreachable. This server is the DNS server configured in the /etc/resolv.conf file, which is used to resolve domain names to IP addresses. The ping command shows that the server cannot be reached, and the nslookup command shows that the name www.comptia.org cannot be resolved using this server. The other options are incorrect because:

The name www.comptia.org does point to a valid IP address, as shown by the nslookup command using another DNS server (8.8.8.8).

The default route is set on the server, as shown by the ip route command, which shows a default gateway of 192.168.168.1.

The network interface eth0 is connected, as shown by the ip link command, which shows a state of UP for eth0. Reference: CompTIA Linux+ Study Guide, Fourth Edition, page 457-458, 461-462.

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asked 02/10/2024
55 Cantera Ct. Johnson
38 questions
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