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Question 36/177
An administrator is investigating why a Linux workstation is not resolving a website. The output of dig and nslookup shows that IPv4 resolution is working, but IPv6 resolution fails.
The administrator executes:
nslookup -querytype=AAAA www.comptia.org
Can't find www.comptia.org: No answer
The workstation has a static entry in /etc/hosts:
104.18.99.101 www.comptia.org
Which of the following is the most likely cause?
The administrator executes:
nslookup -querytype=AAAA www.comptia.org
Can't find www.comptia.org: No answer
The workstation has a static entry in /etc/hosts:
104.18.99.101 www.comptia.org
Which of the following is the most likely cause?
Correct Answer: A
The presence of a static entry in /etc/hosts for www.comptia.org forces the system to use this IP address instead of querying DNS.
This prevents proper IPv6 (AAAA) resolution, as /etc/hosts only contains an IPv4 (A) record.
Removing this static entry allows the system to query DNS for both IPv4 and IPv6 records.
References:
Linux /etc/hosts File - Linux Documentation
This prevents proper IPv6 (AAAA) resolution, as /etc/hosts only contains an IPv4 (A) record.
Removing this static entry allows the system to query DNS for both IPv4 and IPv6 records.
References:
Linux /etc/hosts File - Linux Documentation
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