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Data Link Layer

Data Link Layer Introduction. The data link layer sits between the physical layer and the network layer.The data link layer accepts messages from the network layer and controls the hardware that actually transmits them.Both the sender and receiver have to agree on the rules or protocols that gove

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Data Link Layer

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    1. Data Link Layer After studying this Chapter you should: Describe the role of the data link layer in data transmission List the common sources of error in data transmission Discuss how to prevent data transmission errors Explain the three most common error detection and correction methods Discuss commonly used data link protocols Understand Transmission Efficiency

    2. Data Link Layer Introduction The data link layer sits between the physical layer and the network layer. The data link layer accepts messages from the network layer and controls the hardware that actually transmits them. Both the sender and receiver have to agree on the rules or protocols that govern how their data link layers will communicate with each other.

    3. Data Link Layer - Introduction Responsible for moving messages from one device to another Controls the way messages are sent on media Organizes physical layer bit streams into coherent messages for the network layer Major functions of a data link layer protocol Media Access Control Controlling when computers transmit Error Control Detecting and correcting transmission errors Message Delineation Identifying the beginning and end of a message

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