Internet

1. What is the Internet?
    The Internet is a global system of interconnected computer networks that use the standard Internet   
    protocol suite  to serve billions of users worldwide.(Network of Network)
    

2. What is the ARPANET?

    The Advanced Research Projects Agency Network (ARPANET) was the world's first operational 

    packet switching network, the first network to implement TCP/IP, and the progenitor of what was to  

    become the global  Internet.

3. What is the NSF?

    The National Science Foundation Network (NSFNET) was a program of coordinated, evolving projects  

    sponsored by the National Science Foundation (NSF) beginning in 1985 to promote advanced research  

    and education networking in the United States.