A SaaS company with remote staff sees name failures only on laptops, and the enterprise probe cannot observe the resolver those laptops use. Which test should the team run?
Select an answer to reveal the explanation.
Short Explanation
The city directory has no listing for a name that lives only in the household phone book. You run an Endpoint Agent test on the laptop that uses the client's own resolver. A data-center Enterprise Agent, a cloud DNS test, or a server page-load is querying some other resolver.
Full Explanation
Name failures occur only on the laptops, and the enterprise probe cannot see the resolver those laptops use, so a test from any other resolver is aimed at a different resolver. An Endpoint Agent test on the laptop that queries the client's own resolver measures DNS from the user device, which is the only vantage that uses the failing resolver. An Enterprise Agent in the data center that queries a resolver the laptops do not use can return a clean lookup while the laptops still fail, because it never asks the resolver at fault. A DNS test from a cloud probe that does not use the resolver configured on the laptops has the same blind spot from another network. A page-load test that runs on a server and does not resolve names from the laptop loads the page with the server's resolver and never exercises the client lookup that is failing. Exam caveat: DNS is only comparable when the test uses the same resolver the user device uses. Operational check: record the resolver reported by the endpoint test on an affected laptop and confirm the enterprise probe is using a different one.