U.S. flag   An unofficial archive of your favorite United States government website
Dot gov

Official websites do not use .rip
We are an unofficial archive, replace .rip by .gov in the URL to access the official website. Access our document index here.

Https

Secure websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to our website. Please do not share sensitive information with us.

firewalls

"A device or program that controls the flow of network traffic between networks or hosts that employ differing security postures." (SP 800-41 Rev. 1)

Topics

Created June 08, 2016, Updated June 22, 2020