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<html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> <link type="text/css" rel="stylesheet" href="../../../../../css/ccna.css"> <script src="../../../../../js/framesetHelper.js" language="JavaScript"></script><script language="JavaScript"> var pageLoaded = false; var current = ''; var currentChapter = 'knet-v214aCH47502'; function launchReference(rioID, rloID, chapterID) { contentID = "knet-v214aCV47051"; dash = contentID.indexOf('-'); sub1 = contentID.substring(0,dash); sub2 = contentID.substring(dash+1); numbackParams = "CHAPID=" + chapterID + "/RLOID=" + rloID + "/RIOID=" + rioID; ContentRef = "../../../../../"+ numbackParams + "/"+ sub1 +"/"+ sub2 +"/"; eval('top.frames.main_frame.location.href="'+ContentRef+'referencecontroller_pf.html"'); } function PrevPage() { top.currentSupport--; if (top.currentSupport <= 0) { returnContent(); } else { if (top.firstSupportPage == top.contentResourceID) { returnContent(); } else if (top.prevPage == quizID) { launchQuiz(); } else { launchReview(); } } } function launchReview(reviewID) { top.currentSupport = 0; chapterID = "knet-v214aCH47502"; nbparams = "CHAPID="+chapterID+"/RLOID="+"knet-v214aRLO47529"+"/RIOID="+reviewID; dash = chapterID.indexOf('-'); sub1 = chapterID.substring(0,dash); sub2 = chapterID.substring(dash+1); ContentRef = "../../../../../"+ nbparams +"/"+ sub1 +"/"+ sub2 +"/"; //alert(ContentRef); eval('top.frames.main_frame.location.href="'+ContentRef+'pageframesetrio.html"'); //added for navigating between Quiz and Review and back to regular Chapter pages top.currentSupport++; top.firstSupportPage = reviewID; top.prevPage = reviewID; top.contentResourceID = ''; } function launchQuiz(quizID) { top.currentSupport = 0; chapterID = "knet-v214aCH47502"; nbparams = "CHAPID="+chapterID+"/RLOID="+"knet-v214aRLO47531"+"/RIOID="+"knet-v214aRIO120895"; dash = chapterID.indexOf('-'); sub1 = chapterID.substring(0,dash); sub2 = chapterID.substring(dash+1); ContentRef = "../../../../../"+ nbparams +"/"+ sub1 +"/"+ sub2 +"/"; //alert(ContentRef); eval('top.frames.main_frame.location.href="'+ContentRef+'pageframesetrio.html"'); //added for navigating between Quiz and Review and back to regular Chapter pages top.currentSupport++; top.firstSupportPage = quizID; top.prevPage = quizID; top.contentResourceID = ''; } function returnContent() { rioID = top.currentPage; rloID = top.currentRLO; ContentID = top.currentChapter; top.firstSupportPage = ''; top.prevPage = ''; top.contentResourceID = ''; top.currentSupport = 0; nbparams = "CHAPID="+ContentID+"/RLOID="+rloID+"/RIOID="+rioID; dash = ContentID.indexOf('-'); sub1 = ContentID.substring(0,dash); sub2 = ContentID.substring(dash+1); ContentRef = "../../../../../"+ nbparams +"/"+ sub1 +"/"+ sub2 +"/" eval('top.frames.main_frame.location.href="'+ContentRef+'pageframesetrio.html"'); } </script> </head> <body leftmargin="20" topmargin="10" marginwidth="30" marginheight="10" bgcolor="#FFFFFF" onLoad="window.focus();" background="../../../../../images/ccna/common/lab/bglab.gif"> <table bgcolor="#000000" cellspacing="0" width="100%" border="0"> <tr> <td width="100%"> <table cellpadding="4" cellspacing="1" width="100%" border="0"> <tr> <td width="10%" bgcolor="#FFFFFF" valign="top"> <table cellpadding="0" cellspacing="0" width="100%" border="0"> <tr> <td width="33%"><script language="JavaScript"> //if (parent.parent.getTopName() == "chapterframeset") //{ var imgSource = '../../../../../images/ccna/common/lab/labback.gif'; document.write('<a href="javascript:PrevPage();">'); document.write('<img src="' + imgSource + '" border="0">'); document.write('</a>'); //} </script></td><td width="33%"><img border="0" src="../../../../../images/ccna/common/icon4.gif"></td> </tr> </table> <p> </p> </td><td bgcolor="#FFFFFF" valign="top"> <p align="left"> <span class="resourceTitle">Lab 2.3.4 OSI Model and TCP/IP - Overview</span> </p><p class="smtext">Estimated time: 20 min.</p><p align="left"> <span class="resourceSectionTitle">Objectives:</span> </p> <blockquote> <p class="smtext">This Lab will focus on your ability to accomplish the following tasks:</p> <span class="smtext"> <ul type="disc"><li>Describe the four layers of the TCP/IP model</li><li>Relate the seven layers of the OSI model to the four layers of the TCP/IP model</li><li>Name the primary TCP/IP protocols and utilities that operate at each layer</li></ul> </span> </blockquote><p align="left"> <span class="resourceSectionTitle">Background:</span> </p> <blockquote> <p class="smtext">This lab will help you develop a better understanding of the seven layers of the OSI model as they relate to the most popular functioning networking model in existence, the TCP/IP model. The Internet is based on TCP/IP, which has become the standard language of networking. Although the TCP/IP model is the most widely used, the seven layers of the OSI model are the ones most commonly used to describe and compare networking software and hardware from various vendors. It is very important to know both the OSI and TCP/IP models and be able to relate (or map) the layers of one to the other. An understanding of the TCP/IP model and the protocols and utilities that operate at each layer is essential when troubleshooting.</p> </blockquote><p align="left"> <span class="resourceSectionTitle">Tools / Preparation:</span> </p> <blockquote> <p class="smtext">You may work individually or in teams. The following resources will be required:</p> <span class="smtext"> <ul type="disc"><li>PC workstation with Monitor, keyboard, mouse, and power cords</li><li>Windows operating system (Win 95, 98, NT, or 2000) installed on PC</li><li>NIC installed and Cat 5 patch cable with connection to the Internet</li><li>Browser software installed (Netscape Navigator 4.6.1 or higher or Internet Explorer 5.1 or higher</li><li>Java, JavaScript, and Style Sheets (must be enabled in your browser's preference settings)</li><li>Flash plug-in</li><li>Sample Ethernet and Token Ring NICs with different connectors (Coax, AUI, RJ-45)</li><li>Sample Hubs, Switches and Routers</li></ul> </span> </blockquote><p align="left"> <span class="resourceSectionTitle">Notes:</span> </p> <blockquote> <p class="smtext"> <img border="0" src="../../../../../CHAPID=knet-v214aCH47502/RLOID=knet-v214aRLO47529/RIOID=knet-v214aRIO125208/knet/v214aclixsi144/line450.gif" width="450" height="1"></p> <p class="smtext"> <img border="0" src="../../../../../CHAPID=knet-v214aCH47502/RLOID=knet-v214aRLO47529/RIOID=knet-v214aRIO125208/knet/v214aclixsi144/line450.gif" width="450" height="1"></p> <p class="smtext">⌨️ 快捷键说明
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