7.2.9 The seven layer OSI model to describe the how applications communicate over a network, including the function and related protocols of each layer

Question 1

State:

Who developed the OSI model and in what year

Answer 1

International Organization for Standardization (ISO) in 1977

Question 2

State:

7 Layers of OSI model

Answer 2

• Physical
• Data Link
• Network
• Transport
• Session
• Presentation
• Application (User at this end)

Question 3

Describe:

Application layer in the OSI model

Answer 3

Protocols for proccess to process communication

Question 4

Describe:

Presentation layer in the OSI model

Answer 4

Provides common representation of the data transferred between application layer services

Question 5

Describe:

Session layer in the OSI model

Answer 5

Provides services to the presentation layer to organise it’s dialogue and manage the data exchange

Question 6

Describe:

Transport layer in the OSI model

Answer 6

Services to segment, transfer and reassemble data for individual communications between the end devices

Question 7

Describe:

Network layer in the OSI model

Answer 7

Services to exchange individual pieces of data over network being identified between different services

Question 8

Describe:

Data Link layer in the OSI model

Answer 8

Protocols which describe methods for exchanging data frames between devices over a common media

Question 9

Describe:

Physical layer in the OSI model

Answer 9

Mechanical, electrical, functional and procedural means to activate, maintain and deactivate physical connections for bit transmission to and from end devices