Long description

Layer 1, the topmost layer: Application Layer

Protocols: H T T P, F T P, POP, etc

Functionality: Higher protocols that allow applications to interact with transport layer

Layer 2: Transport Layer

Protocols: T C P, U D P

Functionality: Ensure transmissions arrive in order and without error

Layer 3: Network Layer

Protocols: I P v4, I P v6

Functionality: Establishes connection, routing, and addressing

Layer 4: Link Layer

Protocols: MAC

Functionality: Responsible for physical transmission of raw bits