Question

Error Control is a mandatory service of

A) Network Layer

B) Transport Layer

C) Session Layer

D) Data Link Layer

 

As far as I know, error control is mandatorily provided by both Transport Layer and Data Link Layer. Both B and D should be the answer?

Comments

but mandatory service of

D) Data Link Layer

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This type of questions I don't ask in gates :3

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In UDP which is a transport layer protocol, error control is not mandatory.

And I think mandatory at network layer and Data link layer.

Answer 1

Data Link Layer.