Question

Error detection and recovery takes place at which layer?

Answer 1

Answer:

Error detection is often done in layer 2 i.e data link layer. Error correction is done at layer 4 i.e transport layer. In data link layer redundant information is added to each frame and then at the receiver end those frames were checked and if it is invalid then the frame will be discarded.

Answer 2

Transport layer is the correct answer to the given question

Explanation:

Transport layer takes the data from the previous layer and perform these Function:

• The main objective of the transport layer is to break the data into smaller individual units and transfer these data units to the Network layer also verify that all sections reach at another end correctly or not.
• The transport also examines the service that is giving to the session layer .it checks the error also gives bugs free point-to-point channel on it and recovery from it it error occurs.  

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