Three Main Protocol would be TCP (Transfer Control Protocol). It allows data to be broken down and sent in the order it is ment to be in.
2. The next would be IP (Internet Protocol) This allows the data to be sent to another device within the same network.
3. Is the DNS (Donain Network Protocol) The DNS also uses a IP address to send data with this it makes sure it is going to the right address and device and will have some websites and businees hold the site for the data to arrive correct and in the right place.