Question

Consider the following statements regarding the OSI model:

1. Application layer provides the control structure for communication between applications; establishes, manages and terminates connections between cooperating applications.

2. Data link layer provides for the reliable transfer of information across the physical link.

3. Transport layer provides end-to-end error recovery and flow control of data.

Which of the above statements are correct?

1. 1 and 2 only
2. 1 and 3 only
3. 1, 2 and 3
4. 2 and 3 only
5.

Answer 1

Correct Answer - Option 4 : 2 and 3 only

The correct answer is option 4.

 Statement 1: Application layer provides the control structure for communication between applications; establishes, manages, and terminates connections between cooperating applications.

False, The Session layer provides the control structure for communication between applications; establishes, manages, and terminates connections between cooperating applications.

Statement 2: Data link layer provides for the reliable transfer of information across the physical link.

True, The Data link layer provides for the reliable transfer of information across the physical link by providing flow control, line discipline, and error control.

The Data Link layer provides reliable transit of data across a physical network link. The Data Link layer translates messages from the Network layer into bits for the Physical layer to transmit.

Statement 3: Transport layer provides end-to-end error recovery and flow control of data.

True, The data link layer and Transport layer provides error control and flow control in OSI. The transport layer provides end-to-end error recovery and flow control of data. The transport layer provides a transparent transfer of data between hosts. It is responsible for end-to-end error recovery and flow control. It ensures complete data transfer. 

Hence the correct answer is 2 and 3 only.