Final answer:
The command 'ns lookup' is used in Windows to bypass the DNS client cache to test DNS name resolution.
Step-by-step explanation:
The Windows command that bypasses the DNS client cache and tests DNS name resolution is ns lookup. This command allows users to query Internet domain name servers for information about host addresses, mail exchanges, and name servers.
It's important to note that ipconfig /flushdns clears the DNS cache, dig is a Linux-based command that also performs DNS lookups, and ping is used to test the reachability of a host on an IP network and to measure round-trip time for messages sent from the originating host. The Windows command that bypasses the DNS client cache and tests DNS name resolution is ns lookup.