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202-450 Exam - Question 24


Performing a DNS lookup with dig results in this answer:

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Correct Answer: C

In DNS, a fully qualified domain name (FQDN) must end with a dot (.) to indicate that it is an absolute name. If the dot is omitted, the DNS server will treat the name as relative and append the zone name to it. In this case, the PTR record shown in the reverse lookup zone file does not have a dot after 'linuserv.example.net', which will cause BIND to append the zone name, resulting in an incorrect query result.

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carlkktwOption: B
Aug 26, 2020

If the `linuserv.example.net` in PTR record is not append with `.`, BIND will append the zone name after the record, which causes the query result in the question.

glorofarz
Jul 28, 2020

can somebody help me to understand where, exactly i spot the error in the output, and which suboption of dig produced this output? being thick here, i know...

ArminaOption: C
Feb 21, 2022

C is correct!