OSI Model

Question 1

Layer 1

Answer 1

Physical Layer

Transmits data over a physical medium.

Question 2

Layer 2

Answer 2

Data-Link Layer

Includes information about the source and destination hardware addresses of the communicating devices. It also specifies lower layer-layer flow control and and error control.

Question 3

Layer 3

Answer 3

Network Layer

Moves packets over an internetwork so that they can be routed to the correct network.

Question 4

Layer 4

Answer 4

Transport Layer

Is usually associated with reliable end-to-end communication. It is the layer responsible for connections, error control, and flow control between sender and receiver.

Question 5

Layer 5

Answer 5

Session Layer

Manages communication sessions between service requesters and service providers. This layer manages communications by establishing, synchronizing and maintaining connection between sender and reciever.

Question 6

Layer 6

Answer 6

Presentation Layer

Formats and translates data. An example of a Presentation layer service is the compression or encryption of data.

Question 7

Layer 7

Answer 7

Application Layer

Supports the communication of applications with the network.