Discussion

Match the following and find the correct answer from the codes given below :

List I	List II
(a) Delivery of packets from source to destination	(i) Application layer
(b) Data transmission rate	(ii) Data link layer
(c) Access to network resources	(iii) Network layer
(d) Provide hop-to pop delivery	(iv) Physical layer

Codes :

Answer: C

The correct matching is (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii).

Delivering packets from source to destination across networks is the job of the network layer.
The data transmission rate (bits per second) is defined at the physical layer.
Access to network resources for users and programs is provided by the application layer.
Hop-to-hop (node-to-node) delivery is the data link layer's task.

The other codes put source-to-destination delivery at the application or data link layer, which is wrong in the OSI model.

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