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Link management: The link control protocol (LCP) is responsible for establishing, configuring, and negotiating a data-link connection. LCP also monitors the link quality and is used to terminate the link. Authentication: Authentication is optional.
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Technique for controlling a data rate so that a sender does not over-run a receiver 1. Stop-and-wait 2. Sliding-window Data Link
In the following sections we will examine several widely-used data link protocols. The first one, HDLC, is a classical bit-oriented protocol whose variants have been in use for decades in many applications. The second one, PPP, is the data link protocol used to connect home computers to the Internet. 3.6.1 HDLC—High-Level Data Link Control
This document contains definitions and terms related to data link protocols and data communications networks. It discusses network architecture, data link protocols, master and slave stations, peer-to-peer networks, functions of data link protocols including line discipline, flow control and error control.
Data Link Layer Protocols The data link layer provides service to the Network Layer above it: The network layer is interested in getting messages to the corresponding network layer module on an adjacent machine. The remote Network Layer peer should receive the identical message generated by
Functions of the Data Link Layer • Provide service interface to the network layer • Dealing with transmission errors • Regulating data flow • Slow receivers not swamped by fast senders 3
