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101 · Question #697
101 Question #697: Real Exam Question with Answer & Explanation
The correct answer is C: make an entry in the client host file. The client hosts file is resolved before DNS, allowing a single machine to map an FQDN to a new IP address without altering DNS records that would affect all users.
Question
server is still on use. And the new virtual server is on a different ip address. What should be done to test this new virtual server using the fully quailed domain name for this application?
Options
- Aadd a DNS record for the fully qualified domain name
- Badd the fully qualified domain name to the browser cache
- Cmake an entry in the client host file
- Dmake an entry in the web server services file
Explanation
The client hosts file is resolved before DNS, allowing a single machine to map an FQDN to a new IP address without altering DNS records that would affect all users.
Common mistakes.
- A. Adding or changing a DNS record would redirect all clients resolving that FQDN to the new IP, breaking access for users still relying on the old server.
- B. Browser DNS caches store previously resolved responses from DNS queries and cannot be manually pre-populated with new custom mappings.
- D. A server's services file maps service names to port numbers (like /etc/services on Linux) and has no role in hostname-to-IP address resolution.
Concept tested. Client hosts file for local FQDN resolution override
Reference. https://learn.microsoft.com/en-us/windows-server/networking/technologies/nslookup/nslookup-overview
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