No, it's a good question. Those are called domain extensions.

There's more than .com.

.com for like commercial, professional sites

.gov for government sites

.org for organizations

.net for network

You can google some more up if you so desire!

Sample sites for you:
http://www.web2thou.com/extesions.html
http://smallbusinesswebsitesguide.com/2007/07/28/com-net-org-what-does-it-all-mean/

well, i know about the others. I was just wondering why they were there. like why is there a .com/net/edu. but thanks anyways

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