To such a profound metaphysical question, there can be two answers.
First, as Senator Ted Stevens once famous said: the Internet is a series of tubes.
Or, as Senate Bill 980 says, in Section 3(a):
The term `Internet’ means collectively the myriad of computer and telecommunications facilities, including equipment and operating software, which comprise the interconnected worldwide network of networks that employ the Transmission Control Protocol/Internet Protocol, or any predecessor or successor protocol to such protocol, to communicate information of all kinds by wire or radio.
But is such a definition right? After all, to define the Internet using the concept of the Internet Protocol is circular.
Plus, it does not have the Zen-like qualities of Senator Stevens’ definition.