In the OSI reference model
, each source
layer communicates directly with its matching destination
layer, creating what's referred to as Peer-to-Peer Communication. The data that is encapsulated
in layer X of the source machine, is unencapsulated
in layer X on the destination machine.
My CIS241 notes
Cisco Networking Academy Program: First-Year Companion Guide, Second Edition published by Cisco Press, page 61