Which of the following statement(s) is/are true regarding OSI layers in…
2021
Which of the following statement(s) is/are true regarding OSI layers in computer networks? Statements: I. The session layer provides means of establishing, maintaining and terminating a session between two end users. II. Data Link layer sets up a logical path between the source and destination computer of the network.
- A.
Only I
- B.
Only II
- C.
Both I and II
- D.
Neither I nor II
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Correct answer: A
The primary role of the Session Layer (Layer 5) is "dialogue control." It manages the communication session between applications. It handles synchronization (checkpoints) so that if a connection drops, the data transfer can resume from the last known good point rather than starting over.
The Data Link Layer (Layer 2) is responsible for "node-to-node" delivery (moving data between two physically connected devices, like our laptop and our router). The Network Layer is what handles "end-to-end" logical paths across multiple different networks using IP addressing.