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uestion 1 What is a protocol data unit? Selected Answer: Answers: The format that the data takes at any layer e.g. packet in the network layer The format that the data takes at any layer e.g. packet in the network layer Corruption of a frame during transmission Data reassembled at the destination Retransmitted packets due to lost communication Jestion 2 What's true about composite periodic signals? Selected Answer: Answers: They can be represented using an analog signal in the frequency domain. They can be represented using an analog signal in the frequency domain. They are represented using a discrete frequencies in the frequency domain. They have infinite number of frequencies in a specific frequency range. They can be represented using one simple periodic signal