Overall Analogy: Sending letter?
Layers: 5-7 Analogy: ? Post-it (data) with text written on it
Layer 4: Analogy: ? Encapsulate post-it note in a sheet of tri-folded paper (datagram), person’s name (port) is written on the outside of the paper
Layer: 3, Analogy: Street Address, Zip, etc. .Paper gets placed in an envelope, source and destination addresses are written on the envelope
Layer: 2, Analogy: ? Envelope gets placed in a manila file folder,
Layer: 1, Analogy: ? Manila file folder is pushed down the table
Encapsulation And De-Ecapsulation In OSI Model from ViiraTech.com