Protocol is a set of language that computer understands.
Types of communication:
i) internet - a global network that provides various types of information and communication facilities.
a computer network that uses Internet Protocol technology to share information, operational systems, or computing services within an organization
iii) extranet - a computer network that allows controlled access from the outside, for specific business or educational purposes
Example of communication devices:
i) network interface card (NIC)
ii) wireless network card
iii) hub or switch
iv) router
v) wireless access point
vi) internal and external modem
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