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Exam 202-450 Topic 3 Question 11 Discussion

Actual exam question for Lpi's 202-450 exam
Question #: 11
Topic #: 3
Performing a DNS lookup with dig results in this answer:

Suggested Answer: C Vote an answer

Explanation
The dig command in the image shows that the reverse DNS lookup for the IP address 192.168.0.1 failed to return the expected hostname linuserv.example.net. Instead, it returned linuserv.example.net.example.net, which indicates that the PTR record in the reverse lookup zone file is missing a dot (.) at the end of the hostname. Without the dot, the hostname is treated as relative to the zone name, which is example.net.
Therefore, the correct syntax for the PTR record in the reverse lookup zone file should be:
1.168.192.in-addr.arpa. IN PTR linuserv.example.net.
The dot at the end of the hostname makes it absolute, meaning it does not append the zone name to it. This way, the reverse DNS lookup will return the correct hostname for the IP address123 References:
Reverse DNS Lookup - WhatIsMyIP.com®
DNS PTR Records - DNSimple Help
How to Configure Reverse DNS for BIND in WHM - cPanel Knowledge Base - cPanel Documentation What is a DNS PTR Record? PTR Record Syntax & Examples - PowerDMARC

by Vincent at Mar 08, 2024, 08:58 AM

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Here are all the actual test exam dumps for IT exams. Most people prepare for the actual exams with our test dumps to pass their exams. So it's critical to choose and actual test pdf to succeed.

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