Windows 2000 Resolver
Windows 2000 DNS includes a caching resolver service. The caching resolver reduces DNS network traffic and speeds name resolution by providing a local cache for DNS queries. For troubleshooting purposes, this service can be viewed, stopped, and started like any other Windows 2000 service by using the Component Services console; but the caching resolver is enabled by default.
The Windows 2000 resolver performs the following tasks:
General caching of queries.
Keeps track of transient (Plug and Play) network adapters and their IP configurations.
Keeps track of connection-specific domain names.
When a server fails to respond to a query, the resolver ceases to query that server for a certain amount of time.
When the resolver receives multiple A resource records from a DNS server, it prioritizes them based on their IP address.