Question 1:
For each of the following functions identify the corresponding layer from OSI model.

a. Communicates directly with user’s application program
b. Error correction and retransmission.
c. Mechanical, electrical, and functional interface
d. Responsibility for delivery between adjacent nodes
e. Reassembly of data packets

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Question 2:
If we have three systems as follows:
1. One in communication from outside city
2. Two systems are within the same city but at different offices not far apart

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