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