Domains

=DOMAIN= = = =Common Top-Level Domains (TLDs)=

Restricted TLDs
.**edu** restricted to Educational institutions (could be valid research sites or student project postings) .**gov** restricted to Government use only .**mil** restricted to Military use only

Open TLDs (anyone can register)
.**net** generally Network-related .**com** generally Commercial website .**org** generally a Non-profit and/or Research-related website
 * .info** created for unrestricted use, intended for sites that provide "information"

National TLDs
Examples: .au, .uk, .jp (Australia, The United Kingdom, Japan)

Is NASA's website http://www.nasa.com or http://www.nasa.gov ?