Difference between OSI & TCP Reference Model

Following is the six basic differences between OSI Reference Model & TCP/IP Reference Model.

OSI Reference Model

1. Seven layers
2. It distinguishes between service, interface, and protocol.
3. Firstly description of model and protocol came next
4. Both have Network
5. Supports connectionless and connection oriented communication in network layer and only connection-oriented communication in transport layer.
6. Protocol in OSI model are better hidden and can be replaced relatively easily (No Transparency).

TCP Reference Model

1. Four layers
2. Did not clearly distinguish between service, interface and protocol
3. Protocol comes first and description of model later.
4. Transport and Application layer
5. TCP/IP has only one mode in Network layer (connection less) but supports both modes in Transport layer.
6. Protocols in TCP/IP are not hidden and thus cannot be replaced easily. (Transparency)