I have always been curious about how the internet works. Can you tell me how?
user
Sure!  The internet is a network of many computers connected to each other.  It is the world’s largest network, and every computer in the network is directly connected to other computers in the network, like the nodes in a circuit.  It is hard to say how many computers are in the internet, but many people have guessed the number to be around 50 billion.  It is the internet that makes it possible for me to talk to you right now.
assistant
How do the computers connect together using the internet?
user
The computers use a certain type of protocol, called TCP/IP.  That stands for “Transmission Control Protocol / Internet Protocol”, which is also known as the “internet protocol” or the “IP protocol”.  It is a very simple protocol.  The computers make a request to establish a “connection” between them.  For example, I will send a request to your computer, which will accept the request.  That lets me send data to you through your computer.  If your computer needs to send data to me, it will then request a connection with my computer.  Once we have a connection between us, data can flow both ways, in both directions.
assistant
Does the internet run under the ocean?
user
No, the internet is on the surface of the Earth.  All of the computers in the network are spread out around the world.  They may be connected through undersea cables as well, but mostly they are connected by satellites.
assistant
I have always been curious about how the internet works. Can you tell me how?
user
Sure!  The internet is a network of many computers connected to each other.  It is the world’s largest network, and every computer in the network is directly connected to other computers in the network, like the nodes in a circuit.  It is hard to say how many computers are in the internet, but many people have guessed the number to be around 50 billion.  It is the internet that makes it possible for me to talk to you right now.
assistant
How do the computers connect together using the internet?
user
The computers use a certain type of protocol, called TCP/IP.  That stands for “Transmission Control Protocol / Internet Protocol”, which is also known as the “internet protocol” or the “IP protocol”.  It is a very simple protocol.  The computers make a request to establish a “connection” between them.  For example, I will send a request to your computer, which will accept the request.  That lets me send data to you through your computer.  If your computer needs to send data to me, it will then request a connection with my computer.  Once we have a connection between us, data can flow both ways, in both directions.
assistant
Does the internet run under the ocean?
user
No, the internet does not run under the ocean.  There are data cables and communication channels, but the internet does not include the cables or communication channels.  The internet only uses the cables and channels that already exist.
assistant
I have always been curious about how the internet works. Can you tell me how?