Discussion
Match the following :
| a. Data link layer | i. Flow control |
| b. Network layer | ii. Node to node delivery |
| c. Transport layer | iii. Mail services |
| d. Application layer | iv. Routing |
Codes : a b c d
Answer: B
The correct matching is the data link layer with node to node delivery (ii), the network layer with routing (iv), the transport layer with flow control (i) and the application layer with mail services (iii). This is code ii iv i iii, option (B).
Options (A) and (C) give the network layer flow control or mail services, and option (D) gives the transport layer mail services. Routing is the work of the network layer, so only (B) is right on the second pair.
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