Answer:
The answer to this question is given below in the explanation section
Explanation:
A company that offers services for accessing and using Internet is an Internet Service Provider (ISP). ISP provides internet services to its customer for accessing the Internet and to connect with the world.
However, a public wifi provider is just a router who is sharing with other people the ISP services for Internet. It is also noted that a network is a connection between networks/computers etc. But a network can't provide services for accessing and using the internet.
Modem is used to modulate and demodulate the internet signal provided by ISP to the client.
