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                                        <img border="0" src="../../../../../CHAPID=knet-v214aCH47502/RLOID=knet-v214aRLO47529/RIOID=knet-v214aRIO125208/knet/v214aclixsi144/line450.gif" width="450" height="1"></p>
                                </blockquote>
<p align="left">
                                    <span class="resourceSectionTitle"><span class="resourceRed">Step 1 - The OSI model and associated TCP/IP protocol stack layer.</span></span>
                                </p>
                                <blockquote>
                                    <p class="smtext">
                                        <b>Task:</b> Fill out the following charts based on your knowledge of the OSI model and TCP/IP models.<br>
<b>Explanation:</b> Your understanding of the OSI model as it relates to the TCP/IP model will greatly increase your ability to absorb and categorize networking information as you learn it.</p>
                                    <p class="smtext">1. List the seven layers of the OSI model from the top to the bottom with the proper name for each layer. List the TCP/IP layer number and its correct name in the next columns. Also list the term used for the encapsulation units, the related TCP/IP protocols / utilities and the devices that operate at each layer.</p>
                                    <table cellpadding="0" cellspacing="0" border="0">
                                        <tr>
                                            <td width="100%"><img height="10" width="1" border="0" src="../../../../../images/ccna/common/transdot.gif"></td>
                                        </tr>
                                        <tr>
                                            <td width="100%">
                                                <table bgcolor="#000000" bordercolor="#000000" cellspacing="0" bordercolorlight="#000000" width="100%" border="0">
                                                    <tr>
                                                        <td width="100%">
                                                            <table bgcolor="#FFFFFF" width="100%" cellspacing="0" cellpadding="3" border="0">
                                                                <tr>
                                                                    <td><span class="note"><b>NOTE:</b>
<p class="smtext">More than one OSI layer will be related to certain TCP/IP layers.</p>
</span></td>
                                                                </tr>
                                                            </table>
                                                        </td>
                                                    </tr>
                                                </table>
                                            </td>
                                        </tr>
                                    </table>
                                    <p class="smtext">
                                        <b>OSI comparison with TCP/IP Protocol Stack</b>
                                    </p>
                                    <table border="1" cellpadding="2" cellspacing="0" width="600" bordercolor="#000000">
<tr>
<td class="smtext" colspan="1" rowspan="1" valign="top"><b>OSI #</b></td>
<td class="smtext" colspan="1" rowspan="1" valign="top"><b>OSI Layer Name</b></td>
<td class="smtext" colspan="1" rowspan="1" valign="top"><b>TCP/IP #</b></td>
<td class="smtext" colspan="1" rowspan="1" valign="top"><b>TCP/IP Layer name</b></td>
<td class="smtext" colspan="1" rowspan="1" valign="top"><b>Encapsul. Units</b></td>
<td class="smtext" colspan="1" rowspan="1" valign="top"><b>TCP/IP Protocols At each TCP/IP layer</b></td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>7</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>6</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>5</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>4</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>3</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>2</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
<tr>
<td class="smtext" align="center" colspan="1" rowspan="1" width="49"><b>1</b></td>
<td class="smtext" colspan="1" rowspan="1" width="70">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="100">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
<td class="smtext" colspan="1" rowspan="1" width="78">聽</td>
</tr>
</table>
                                </blockquote>
<p align="left">
                                    <span class="resourceTitle">EXERCISE 2.3.4 OSI MODEL and TCP/IP - ANSWERS</span>
                                </p>
                                <p class="resourceAnswer">
                                    <b>Step 1 - The OSI model and associated TCP/IP protocol stack layer.</b>
                                </p>
                                <p class="resourceAnswer">
                                    <b>Task:</b> Fill out the following chart based on your knowledge of the OSI and TCP/IP models.<br>
<b>Explanation:</b> Your understanding of the OSI model as it relates to the TCP/IP model will greatly increase your ability to absorb and categorize networking information as you learn it.</p>
                                <span class="smtext">
                                    <ol class="resourceAnswer">
<li>List the 7 layers of the OSI model from the top to the bottom with the proper name for each layer. List the TCP/IP layer number and its correct name in the next columns. Also list the term used for the encapsulation units, the related TCP/IP protocols / utilities and the devices that operate at each layer. 
<table cellpadding="0" cellspacing="0" border="0">
                                                <tr>
                                                    <td width="100%"><img height="10" width="1" border="0" src="../../../../../images/ccna/common/transdot.gif"></td>
                                                </tr>
                                                <tr>
                                                    <td width="100%">
                                                        <table bgcolor="#000000" bordercolor="#000000" cellspacing="0" bordercolorlight="#000000" width="100%" border="0">
                                                            <tr>
                                                                <td width="100%">
                                                                    <table bgcolor="#FFFFFF" width="100%" cellspacing="0" cellpadding="3" border="0">
                                                                        <tr>
                                                                            <td><span class="note"><b>NOTE:</b>
<p class="resourceAnswer">More than one OSI layer will be related to certain TCP/IP layers.</p>
</span></td>
                                                                        </tr>
                                                                    </table>
                                                                </td>
                                                            </tr>
                                                        </table>
                                                    </td>
                                                </tr>
                                            </table>
                                        </li>
</ol>
                                </span>
                                <p class="resourceAnswer">
                                    <b>OSI comparison with TCP/IP Protocol Stack</b>
                                </p>
                                <table border="1" cellpadding="0" cellspacing="0" bordercolor="#000000">
<tr>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="35">
<p class="resourceAnswer">
                                                <b>OSI #</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="98">
<p class="resourceAnswer">
                                                <b>OSI Layer Name </b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="41">
<p class="resourceAnswer">
                                                <b>TCP/ IP #</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="81">
<p class="resourceAnswer">
                                                <b>TCP/IP Layer Name</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="75">
<p class="resourceAnswer">
                                                <b>Encapsul. Units</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="107">
<p class="resourceAnswer">
                                                <b>TCP/IP Protocols At each TCP/IP layer </b>
                                            </p>
                                        </td>
</tr>
<tr>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="35">
<p class="resourceAnswer">
                                                <b>7</b>
                                            </p>
<p class="resourceAnswer">聽</p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="98">
<p class="resourceAnswer">
                                                <b>Application</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="41">
<p class="resourceAnswer">
                                                <b>4</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="81">
<p class="resourceAnswer">
                                                <b>Application</b>
                                            </p>
                                        </td>
<td class="resourceAnswer" colspan="1" rowspan="1" valign="top" width="75">
<p class="resourceAnswer">
                                                <b>Data</b>
                                            </p>
                                        </td>