What is the definition of ARPANET?

ARPANET stands for Advanced Research Projects Agency Network. ARPA created it during the time of cold war. It was the first packet switching network and was also known as the 'Predecessor of the Global internet'.

Packet Switching has become the leading foundation for both voice and data communication worldwide. Prior to this, data communication was based on circuit switching. A System could use one communication link to communicate with another machine with packet switching.