OSI Model

Question 1

1.

Answer 1

Physical Layer

Question 2

2.

Answer 2

Data Link Layer

Question 3

3.

Answer 3

Network Layer

Question 3

4.

Answer 3

Transport Layer

Question 4

5.

Answer 4

Session Layer

Question 5

6.

Answer 5

Presentation Layer

Question 6

7.

Answer 6

Application Layer

Question 7

What does the Physical layer do?

Answer 7

Is responsible for the physical cable or wireless connection between network nodes.

Question 8

What dose the Data Link layer do?

Answer 8

Establishes and terminates a connection between two physically connected nodes on a network.

Question 9

What does the Network layer do?

Answer 9

The network layer uses network addresses route packets to a destination node.

Question 10

What does the Transport layer do?

Answer 10

Responsible for ensuring reliable data transfer, error detection, and flow control between end to end systems in a network.

Question 11

What does the Session layer do?

Answer 11

Responsible for opening sessions, ensuring they remain open and functional while data is being transferred, and closing them when communication ends.

Question 12

What does the Presentation layer do?

Answer 12

Responsible for translating, encrypting, and compressing data, ensuring that it is in the appropriate format for the application layer and the network.

Question 13

What does the Application layer do?

Answer 13

Provides network services directly to end user applications, enabling email, file transfer, and web browsing by interfacing with the underlying network layers.