High-level Data Link Control (HDLC)
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The data link layer is the second layer in the OSI seven layer model and its protocols define rules for the orderly exchange of data information between 2 adjacent nodes connected by a data link. Final framing, flow control between nodes, and error detection and correction are added at this layer. In previous chapters the data link layer was discussed in a practical manner. In this chapter its functions will be discussed with reference to HDLC.
KeywordsPrimary Station Control Field Cyclic Redundancy Check Secondary Station Synchronous Communication
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