Microsoft Knowledge Base Article 318803 contains the following summary:
Windows contains a client-side Domain Name System (DNS)
cache.
The client-side DNS caching feature may generate a false impression that
DNS "round
robin" is not occurring from the DNS server to the Windows client
computer.
When you use the
ping
command to search for the same A-record domain name,
the client
may use the same IP address.
This behavior is different from Microsoft
operating systems earlier than Windows 2000.
These operating systems do not
include the client-side DNS caching feature.
This article describes how to
disable DNS caching.
Note
This article
refers to the client portion of DNS.
Do not use this
information for making changes to DNS servers.
