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is connectionless, in that a data packet can travel from a sender to a recipient without the recipient having to send an acknowledgement. Connection-oriented protocols exist at other, higher layers of the OSI model.; Host addressing
:Every host in the network must have a unique address that determines where it is. This address is normally assigned from a hierarchical system. For example, you can be:
:
:"Fred Murphy" to people in your house,
:"Fred Murphy, 1 Main Street"

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