Osi Layers

Front 1

Physical Layer/Layer 1

Back 1

Translates Binary Data onto a physical medium, converts data frames into streams of bits for transmission.

Front 2

Data-Link Layer/Layer 2

Back 2

Translates data packets into frames that include the origin and destination MAC addresses to allow for delivery to specific network hosts. Switches function at this layer

Front 3

Network Layer/Layer 3

Back 3

Manages device addressing (IP) and identifies the locations of devices on the network. Routers function at this layer

Front 4

Transport Layer/Layer 4

Back 4

Segments data into a data stream, establishes logical connections between hosts for data transmission. TCP and UDP function at this layer

Front 5

Session Layer/Layer 5

Back 5

Sets up, manages, and tears down sessions between presentation layer entities, allows for duplex setting configuration, keeps upper layer sessions separate from each other.

Front 6

Presentation Layer/Layer 6

Back 6

Provides coding and conversion format translation, adapts data into a standardised format for transmission.

Front 7

Application Layer/Layer 7

Back 7

Where the user interfaces with the OSI model. Determines standard procedures for controlling data integrity and identifying and determining the availability of communication partners