What was ARPANET?

a precursor to the Internet
an organization created to stabilize and unify the Internet
the first commercial Internet service
an organization devoted to standardizing the Internet

The ARPANET was the first network that provided commercial internet services. And also it was the first network to make use of the TCP/IP protocols. However, you need to know that the first ISP or the internet service provider was the Telenet, and it was the first commercial version of the ARPANET which was introduced in the year 1974. And this service started its service for the customers in the year 1989.

Explanation:

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