Question: a) What is the minimum time required to send a L1-byte frame from station A to station B and to receive a L2-byte acknowledgment? Assume

a) What is the minimum time required to send a L1-byte

a) What is the minimum time required to send a L1-byte frame from station A to station B and to receive a L2-byte acknowledgment? Assume that the distance from A to B is d, the speed of light in cable is v, and the transmission rate is R. (5 Marks) b) Suppose transmission channels become virtually error-free. Is the data link layer still needed? Explain. (5 Marks) c Which of the TCP/IP transport protocol (UDP or TCP) would you select for the following applications: packet voice, file transfer, remote login? (5 Marks) IKI

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