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<!DOCTYPE html>
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<title>Section 1: Introduction to the Link Layer</title>
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<div class="offset-sm-1 col-sm-10">
<h2>Learning Objectives</h2>
<p>After successfully completing this section, you should be able to</p>
<ol>
<li>describe link layer services.</li>
<li>discuss the general issues related to the services provided by the link layer.</li>
<li>explain the link layer’s relationships with the layers above and below it in the Internet protocol stack.</li>
</ol>
<h2>Learning Tasks</h2>
<p>Required:</p>
<ol>
<li>Watch the <a href="03_Documents06/comp347u6s1.pdf?isCourseFile=true" target="_self">slideshow</a> for this section.</li>
<li>Study Section 6.1, Introduction to the Link Layer, in the textbook.</li>
</ol>
<h2>Terms and Topics</h2>
<div class="row">
<div class="col-11">
<p><strong>Section 1 – Introduction to the Link Layer </strong></p>
</div>
<div class="col-1"></div>
</div>
<div class="row">
<div class="col-6">
<p>Nodes in the link layer<br>Links in the link layer<br>Link layer frame<br>Link layer services<br>Framing<br>Link access</p>
</div>
<div class="col-6">
<p>Reliable delivery<br>Error detection and correction<br>Where is the link layer implemented?<br>Network adapter<br>Network interface card (NIC)</p>
</div>
</div>
<h2>Leading Questions</h2>
<ol>
<li>What services does the link layer provide?</li>
<li>What does a data link layer protocol do?</li>
<li>What are frames?</li>
<li>What are some commonly used link layer protocols?</li>
<li>What are nodes and links, respectively, in a link layer?</li>
<li>What are the framing, link access, reliable delivery, and error detection and correction services provided by a link layer?</li>
<li>Where is the link layer implemented in a network?</li>
<li>What do network interface cards (NICs) do in computer networks?</li>
</ol>
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