$1\mathrm{.}1-1$ What is the Internet? Which of the following descriptions below correspond to a "nuts$-$and$-$bolts" view of the Internet? Select one or more of the answers below that are correct. $[$Hint: more than one of answers below are correct$].$

Question $4$ options:

A collection of billions of computing devices, and packet switches interconnected by links.

A place I go for information, entertainment, and to communicate with people.

A "network of networks".

A collection of hardware and software components executing protocols that define the format and the order of messages exchanged between two or more communicating entities, as well as the actions taken on the transmission and$/$or receipt of a message or other event.

A platform for building network applications.