Beware of Unused NICs (From: http://windowsitpro.com/article/articleid/96610/beware-of-unused-nics.html)

Executive Summary:
When you're configuring a new Microsoft Windows server that has multiple network interface cards (NICs), it's important that you disable any NICs that aren't plugged in to the network. If you don't disable an unused NIC, problems can arise on domain controllers (DCs) running Domain Name System (DNS). The DNS server problems can impede the performance of client computers.

 For more information:

http://windowsitpro.com/article/articleid/96610/beware-of-unused-nics.html

Beware of Unused NICs (From: http://windowsitpro.com/article/articleid/96610/beware-of-unused-nics.html)