(c) What is the main function of the data-link layer in the TCP/IP protocol suit? What type of addresses is used in this layer?

(b) The processes (A, B, and C) are running concurrently. Process A has acquired File1. Process B has acquired File2, but needs File1. Process C has acquired File3, but needs File2. Draw a diagram for these processes. Is this a deadlock situation? If your answer is “no”, show how the processes can eventually finish their tasks.