GATE | GATE-CS-2004 | Question 15
Choose the best matching between Group 1 and Group 2.
Group-1 Group-2 P. Data link 1. Ensures reliable transport of data over a physical point-to-point link Q. Network layer 2. Encoder/decodes data for physical transmission R. Transport layer 3. Allows end-to-end communication between two processes 4. Routes data from one network node to the next
(A) P-1, Q-4, R-3
(B) P-2, Q-4, R-1
(C) P-2, Q-3, R-1
(D) P-1, Q-3, R-2
Explanation: Data link layer is the second layer of the OSI Model. This layer is responsible for data transfer between nodes on the network and providing a point to point local delivery framework. So, P matches with 1.
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Network layer is the third layer of the OSI Model. This layer is responsible for forwarding of data packets and routing through intermediate routers. So, Q matches with 4.
Transport layer is the fourth layer of the OSI Model. This layer is responsible for delivering data from process to process. So, R matches with 3.
Thus, A is the correct option.
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