What is Computer Network?
Connects two or more devices together to share information and services.
What are information and services? 

• Website

• Database

• Documents

• Email and messaging

• Telephony and video conference

• Printers and faxes

• Music

• Video

 What is Protocol?
Protocols are rules
They govern how devices communicate and share information across the network.

Ex:

• Internet Protocol
• Hyper Text Transfer Protocol
• Simple Mail Transfer Protocol