OSI Encapsulation
OSI Encapsulation
- OSI Encapsulation is the process of encapsulating and decapsulating information for transport at the different layers of the OSI Model
- When a client sends information, it gets packed up into different PDUs like a Russian doll from L7 to L2 before getting sent over the wire
| OSI Layers | TCP/IP Layers | PDU for each layer | Data Encapsulation (1>7) | Data De-encapsulation (7>1) |
|---|---|---|---|---|
| Application | --- | Data | ||
| Presentation | Application | Data | ||
| Session | --- | Data | ||
| Transport | Transport | Segment | Packets>Segments | Segment>Packets |
| Network | Internet | Packet | Frames>Packets | Packets>Frames |
| Data-Link | Data-Link | 802.3 Frames | Bits>Frames | Frames>Bits |
| Physical | Physical | bits | - | - |
Source: Original