CINXE.COM

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head><script type="text/javascript" src="https://web-static.archive.org/_static/js/bundle-playback.js?v=7YQSqjSh" charset="utf-8"></script> <script type="text/javascript" src="https://web-static.archive.org/_static/js/wombat.js?v=txqj7nKC" charset="utf-8"></script> <script>window.RufflePlayer=window.RufflePlayer||{};window.RufflePlayer.config={"autoplay":"on","unmuteOverlay":"hidden"};</script> <script type="text/javascript" src="https://web-static.archive.org/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("http://www.test-king.com/guide-70-646-ipv4-to-ipv6-compatibility-and-transition-to-ipv6.htm","20170615182243","https://web.archive.org/","web","https://web-static.archive.org/_static/", "1497550963"); </script> <link rel="stylesheet" type="text/css" href="https://web-static.archive.org/_static/css/banner-styles.css?v=p7PEIJWi" /> <link rel="stylesheet" type="text/css" href="https://web-static.archive.org/_static/css/iconochive.css?v=3PDvdIFv" />  <script> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','//web.archive.org/web/20170615182243/http://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-11066347-1', 'test-king.com'); ga('send', 'pageview'); </script> <title>IPv4-to-IPv6 Compatibility and Transition to IPv6</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <meta name="description" content="Know more about IPv4-to-IPv6 Compatibility and Transition to IPv6."> <meta name="author" content="Test-King"> <meta http-equiv="content-language" content="en"/> <meta name="robots" content="index, follow"/> <meta name="GOOGLEBOT" content="INDEX, FOLLOW"/> <base href="https://web.archive.org/web/20170615182243/http://www.test-king.com/"/> <link rel="stylesheet" type="text/css" href="/web/20170615182243cs_/http://www.test-king.com/design/css/style.css"/> <script type="text/javascript" src="/web/20170615182243js_/http://www.test-king.com/design/js/common.js"></script> <script type="text/javascript" src="/web/20170615182243js_/http://www.test-king.com/design/js/validator.js"></script> <script type="text/javascript" src="/web/20170615182243js_/http://www.test-king.com/design/js/jquery.min.js"></script>  <script type="text/javascript" language="JavaScript"> var aValidatorMes = []; aValidatorMes['minlen'] = 'Length of `%s0` field should be more than or equal to %s1 characters.'; aValidatorMes['maxlen'] = 'Length of `%s0` field should be less than or equal to %s1 characters.'; aValidatorMes['mineq'] = '`%s0`: field value should be more than %s1.'; aValidatorMes['maxeq'] = '`%s0`: field value should be less than %s1.'; aValidatorMes['min'] = '`%s0`: field value should be more than or equal to %s1.'; aValidatorMes['max'] = '`%s0`: field value should be less than or equal to %s1.'; aValidatorMes['pattern'] = 'Please provide a correct `%s0`.'; aValidatorMes['custom'] = '`%s0`: %s1';</script> <script>var aMessages = [];aMessages['js.sure']='Are you sure?';aMessages['js.delete']='Do you really want to delete this %s?';aMessages['js.retire']='Do you really want to retire this %s?';aMessages['js.add_to_cart']='Selected product(s) were added to your shopping cart.\n\n You will see it in "Shopping Cart" block in the top-left corner of this window.';aMessages['js.auth.wait']='This may take a few seconds. Please be patient!';aMessages['js.select_prod']='Please select at least one product.';</script> <script type="text/javascript"> var check=0; function empty(id) { request = document.getElementById(id).value; if(request == 'Search') document.getElementById(id).value=""; } function nice(id) { check = 1; document.getElementById(id).style.background='#fff'; } function back(id) { check = 0 ; document.getElementById(id).style.background='#afc6de'; } function sel(id) { var text = $("#"+id).html(); $('#search_value').val(text); $('#resSearch').css('display','none'); $('#searchForm').attr('action', 'https://web.archive.org/web/20170615182243/http://www.test-king.com/search'); $('#searchForm').attr('method', 'get'); $('#searchForm').trigger('submit'); } function update() { $('#resSearch').css('display','block'); } $(document).ready(function() { $(function(){ $("#search_value").keyup(function(){ var search = $("#search_value").val(); $.ajax({ type: "POST", url: "https://web.archive.org/web/20170615182243/http://www.test-king.com/newsearch.html", data: {"search": search}, cache: false, success: function(response){ $("#resSearch").css('display', 'block'); $("#resSearch").css('border', '1px solid #2e5d93'); $("#resSearch").css('border-radius', '5px'); $("#resSearch").html(response); } }); return false; }); $('#ddmenu li').hover(function () { clearTimeout($.data(this,'timer')); $('ul',this).stop(true,true).slideDown(200); }, function () { $.data(this,'timer', setTimeout($.proxy(function() { $('ul',this).stop(true,true).slideUp(200); }, this), 100)); }); $('#ddmenu2 li').hover(function () { clearTimeout($.data(this,'timer')); $('ul',this).stop(true,true).slideDown(200); }, function () { $.data(this,'timer', setTimeout($.proxy(function() { $('ul',this).stop(true,true).slideUp(200); }, this), 100)); }); }); }); function sendForm() { if($('#search_value').val() != 'Search' && $('#search_value').val() != '') { $('#searchForm').attr('action', 'https://web.archive.org/web/20170615182243/http://www.test-king.com/search'); $('#searchForm').attr('method', 'get'); $('#searchForm').trigger('submit'); } else { empty('search_value'); $('#search_value').focus(); } } function checkResSearch() { if(check == 0) $('#resSearch').css('display','none'); } </script> </head> <body> <div id="wrap"> <div id="header"> <div class="inner-head"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/logo.png" width="249" height="60" alt="TEST-KING" title="TEST-KING" class="fl-lft png"/></a> <div class="mcafee"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/headers/20170615.png" class="png" alt="McAfee Secure" title="McAfee Secure"/></div> <form name="form_search" id="searchForm" action="https://web.archive.org/web/20170615182243/http://www.test-king.com/search" method="get"> <div class="search"> <input type="text" name="q" id="search_value" maxlength="30" value="Search" onclick="empty('search_value')" onfocus="document.getElementById('resSearch').style.display='block';" onblur="checkResSearch();" autocomplete="off"> </div> <input type="button" class="btn-go" id="do_search" onclick="sendForm()" alt="Search" title="Search"> </form> <div id="resSearch"></div> <div class="clear"></div> </div> <div id="menu"> <nav> <div class="inner-menu"> <div class="fl-lft lmenu"> <ul id="ddmenu"> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/" class="bordr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mhome.png" alt="Home" width="38" height="17" class="png"/></a></li> <li> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/products.htm" class="bordr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mprod.png" alt="Products" width="55" height="17" class="png"/></a> <ul> <li class="first"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/certifications.htm">Vendors</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Apple.htm">Apple</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Avaya.htm">Avaya</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Checkpoint.htm">Checkpoint</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Citrix.htm">Citrix</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-CompTIA.htm">CompTIA</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-ECCouncil.htm">ECCouncil</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-EMC.htm">EMC</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Exin.htm">Exin</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-IBM.htm">IBM</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-ISC.htm">ISC</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Juniper.htm">Juniper</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-LPI.htm">LPI</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Network-Appliance.htm">Network Appliance</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Oracle.htm">Oracle</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-RedHat.htm">RedHat</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-The-Open-Group.htm">The Open Group</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-VMware.htm">VMware</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/certifications.htm" class="alllink">View All</a></p> </div> </li> <li class="second"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/certifications.htm">Certifications</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CASP.htm">CASP</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CCA-V.htm">CCA-V</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CCP-V.htm">CCP-V</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CCSA-R77-30.htm">CCSA R77.30</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CCSE-R77-30.htm">CCSE R77.30</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CEH.htm">CEH</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CISSP.htm">CISSP</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CISSP-Concentrations.htm">CISSP Concentrations</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CompTIA-A-plus.htm">CompTIA A+</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CompTIA-Linux-plus-Powered-by-LPI.htm">CompTIA Linux+ Powered by LPI</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CompTIA-Network-plus.htm">CompTIA Network+</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-CompTIA-Security-plus.htm">CompTIA Security+</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learn-language/IELTS.htm">IELTS</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-ITIL-V3-Foundation.htm">ITIL V3 Foundation</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-JNCIA-Junos.htm">JNCIA-Junos</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-PCNSE7.htm">PCNSE7</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-PMP.htm">PMP</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-RHCSA.htm">RHCSA</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-TOGAF-9-Certified.htm">TOGAF 9 Certified</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-VCA6-DCV.htm">VCA6-DCV</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-VCP6-DCV.htm">VCP6-DCV</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-VCP6-5-DCV.htm">VCP6.5-DCV</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-VCP7-CMA.htm">VCP7-CMA</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cert-VMCE.htm">VMCE</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/certifications.htm" class="alllink">View All</a></p> </div> </li> <li class="third"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Specialized-Certifications.htm">Specialized Certifications</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Cloud-Certifications.htm">Cloud Certifications</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Java-Certifications.htm">Java Certifications</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Linux-Certifications.htm">Linux Certifications</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Security-Certifications.htm">Security Certifications</a></p> </div> </li> <li class="fourth"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/service-management.htm">IT Service Management</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/ITIL-Expert-Level.htm">ITIL Expert Level</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/ITIL-Foundation.htm">ITIL Foundation</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/ITIL-Intermediate-Level.htm">ITIL Intermediate Level</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/ITIL-Managing-Across-the-Lifecycle.htm">ITIL Managing Across the Lifecycle</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/ITIL-Master-Qualification.htm">ITIL Master Qualification</a></p> </div> </li> <li class="fifth"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/test-preparation.htm">Test Preparation</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/College-Admission.htm">College Admission</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Financial-Tests.htm">Financial Tests</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Graduate-Admission.htm">Graduate Admission</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Health-Fitness-Sciences.htm">Health & Fitness Sciences</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Medical-Tests.htm">Medical Tests</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Misc-Tests.htm">Misc Tests</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Pharmacy-Nursing-Tests.htm">Pharmacy & Nursing Tests</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/School-Admission.htm">School Admission</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learning/Teaching.htm">Teaching</a></p> </div> </li> <li class="sixth"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/quality-assurance.htm">Quality Assurance & Software Testing</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-ASQ.htm">ASQ</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-ISTQB.htm">ISTQB</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-Six-Sigma.htm">Six Sigma</a></p> </div> </li> <li class="seventh"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/project-management.htm">Project Management</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-PMI.htm">PMI</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-PRINCE2.htm">PRINCE2</a></p> </div> </li> <li class="eight"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/languages.htm">English Test Preparation</a> <div class="ddmenu_list"> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learn-language/IELTS.htm">IELTS</a></p> <p><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/learn-language/TOEFL.htm">TOEFL</a></p> </div> </li> </ul> </li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/megapacks.htm" class="bordr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mpack.png" alt="Mega Packs" width="72" height="17" class="png"/></a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/request-exam.htm" class="bordr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mex-request.png" alt="Request Exam" width="86" height="17" class="png"/></a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/license.htm" class="bordr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mcorp.png" alt="Corporate Accounts" width="120" height="17" class="png"/></a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/faq.htm"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mfaq.png" alt="FAQ" width="24" height="17" class="png"/></a></li> </ul> </div> <div class="rmenu"> <ul id="ddmenu2"> <li class="bordr"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/member_area/home.htm"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/macc.png" alt="My Account" width="70" height="17" class="png"/></a> <ul> <li><a href="https://web.archive.org/web/20170615182243/https://www.test-king.com/signup.htm">Register</a></li> </ul> </li> <li class="bordr"><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/cart.htm"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mcart.png" alt="Cart" width="49" height="17" class="png"/></a></li> <li> <a href="" id="loginhref" class="login"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/mlogin.png" alt="Log In" width="36" height="17" class="png"/></a> <div id="loginBox"> <form action="https://web.archive.org/web/20170615182243/https://www.test-king.com/signup.htm" method="post" class="loginboxfrom" onsubmit="return loginVerify();" name="loginboxForm"> <input type="hidden" name="act" value="login"> <span class="errmess" id="loginemailErr" style="display:none;">Please provide a correct email address!</span> Email address:<br/> <input type="text" id="inp-text" name="login" value="" maxlength="100"> <p class="padt7">Password:</p> <input type="password" id="inp-text" name="pass" maxlength="30" value=""><br/> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/forgot.htm" class="forg">Forgot your password?</a> <div class="text-cntr"><input type="image" src="/web/20170615182243im_/http://www.test-king.com/design/images/btn-login.png" alt="Login" title="Login" class="png"/></div> </form> </div> </li> </ul> </div> <div class="clear"></div> </div> </nav> </div> </div> <div class="inner-cont"> <div id="breadcrumbs"><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/">Home</a><img src="/web/20170615182243im_/http://www.test-king.com/design/images/breadcrumb.png" width="14" height="11" class="png"/><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/it-guides.htm">IT Guides</a><img src="/web/20170615182243im_/http://www.test-king.com/design/images/breadcrumb.png" width="14" height="11" class="png"/><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/vendor-.htm"></a> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/exams/70-646.htm">70-646</a> - <span>IPv4-to-IPv6 Compatibility and Transition to IPv6</span></div> <div id="left"> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/lgreytop.png" width="720" height="5" class="png"/></div> <div class="greybox"> <div id="certhome" class="text2"> <h1>IPv4-to-IPv6 Compatibility and Transition to IPv6</h1> <p><span class="bold">Exam:</span> 70-646 - Windows Server 2008, Server Administrator <hr class="mainhr2"> <p>Transition from IPv4 to IPv6 has many advantages for an organization. The likelihood of their coexistence is also high for an organization may opt for a gradual transition. It makes it imperative to discuss compatibility between IPv4 and IPv6. Before discussing the transition technologies let us look at the advantages of IPv6 over IPv4:</p> <ul> <li>Increased Address Space from 32-bit structure to 128 bits.</li> <li>Automatic Address Configuration by supporting stateless and stateful configuration.</li> <li>Network-Level Security for IPsec is mandatory for IPv6.</li> <li>Real-Time Data Delivery</li> <li>Routing Table Size have been reduced</li> <li>Header Size and Extension Headers are smaller and</li> <li>Removal of Broadcast Traffic <b>in case of IPv6</b>.</li> </ul> <h4>Implementing IPv4-to-IPv6 Compatibility</h4> <p>IPv6 provides compatible addresses for facilitating migration from IPv4 to IPv6 and implementing transition technologies.</p> <h4>IPv4-Compatible Address</h4> <p>IPv4 compatible addresses are used by Dual Stack Nodes for communicating with IPv6 over an IPv4 infrastructure. The last four octets in the address denote the dotted decimal representation of an IPv4 address. Nodes with IPv4 and IPv6 protocols are known as Dual stack nodes. When IPv4 compatible address is used as an IPv6 destination, encapsulation of IPv6 takes place with a IPv4 header. This is forwarded to the destination by using IPv4 infrastructure automatically.</p> <h4>IPv4-Mapped Address</h4> <p>The IPv4 mapped address 0:0:0:0:0:ffff:w.x.y.z (or ::fffff:w.x.y.z) is used for representing an IPv4 only node to an IPv6 node. This makes it feasible to map IPv4 devices that income[atible with IPv6 address space. The mapped address is not used as a source or destination address of an IPv6 packet.</p> <h4>Teredo Address</h4> <p>Every Teredo address includes a 32 bit prefix. In Windows systems like Server 2008, 2008 R2, Vista and Windows 7, the Teredo prefix is usually 2001::/32, followed by the IPv4 (32-bit) Teredo server public address. 16 bits that follow are kept for Teredo flags. At the moment only the highest-ordered flag bit - the cone flag is specified. defined The following bits are assigned to external UDP port corresponding to all Teredo traffic for the Teredo client interface. As soon as the server sends the first data packet to the client, NAT maps the source UDP port to an external UDP port, ensuring that they aren't the same. Teredo traffic for the host interface utilizes the same external UDP port. The external port identification value is hidden behind the exclusive ORing with 0xffff. Hidden external ports prevent translation of payload packets by NAT.</p> <h4>ISATAP Addresses</h4> <p>IPv6 tends to employ an ISATAP address for communicating amongst over an IPv4 intranet. In the beginning, an ISATAP address includes a 64-bit unicast site loacla, link-local or 6to4 global prefix. The next 32 bits are the ISATAP identifier 0:5efe. The remaining 32 bits carry the IPv4 address, shown in hexadecimal notation, or dotted decimal form. A private or a public IPv4 address can be incorporated as an ISATAP address.</p> <p>For example, the ISATAP address fe80::5efe:w.x.y.z address has a link-local prefix; the fec0::1111:0:5efe:w.x.y.z address has a site-local prefix; the 3ffe:1a05:510:1111:0:5efe:w.x.y.z address has a global prefix; and the 2002:9d36:1:2:0:5efe:w.x.y.z address has a 6to4 global prefix. In all cases w.x.y.z represents an IPv4 address.</p> <p>Both Windows Server 2008 and Windows Server 2008 R2, have the ISATAP address configuration defaulted to fe80::5efe:w.x.y.z. This is done for all IPv4 address that are assigned to a node. The link local ISATAP address allows communication of two hosts over an IPv4 network by using the ISATAP address of each other.</p> <p>IPv4 to IPv6 configuration can be implemented by using netsh interface.</p> <h4>Planning for Transition</h4> <p>There is no specific time for transition that is prescribed. It is for the administrator to decide in favor or against early adoption. The transition process is based on an assumption that a IPv4 infrastructure is available. It is important to pay attention to the following aspects while planning a transition:</p> <ul> <li>First and foremost it is important to find if IPv6 is supported by the upstream ISPs;</li> <li>Determining if the networking hardware is capable of supporting the protocol.</li> </ul> <p>Several transition strategies and technologies are available. The most commonly used strategies are discussed below.</p> <h4>Transition Strategies</h4> <ul> <li><b>Dual Stack Transition:</b> This is the most simple approach to transition. It is based on the assumption that the hosts and routers support both the protocols and are capable of transmitting and receiving both types of packets. It is also capable of operating in any of the three modes: <ul> <li>With only the IPv4 stack enabled</li> <li>With only the IPv6 stack enabled</li> <li>With both IPv4 and IPv6 stacks enabled</li> </ul> Since the method supports both the protocols it can be configured with both IPv4 32-bit addresses and IPv6 128-bit addresses. </li> <li><b>Configured Tunneling Transition:</b> In case this method is chosen for transition purposes, the functionality of the existing IPv4 routing infrastructure remains undisturbed. It is able to carry IPv6 traffic even when the routing infrastructure is being developed. A tunnel is a two way point to point link between endpoints of two networks. Encapsulation is used for passing the data through the tunnel. IPv6 packet is transmitted in a IPv4 packet. The IPv4 header is created at the entry point of the tunnel and is removed at the exit point at the tunnel. The term explicit tunnels is used for describing configured tunnels. These can be configured as host to host, router-to-router, host-to-router, router-to-host. A tunnel broker can be used for managing the configured tunnel.</li> <li><b>Automatic Tunneling:</b> This allows communication of IPv4 and IPv6 nodes over an IPv4 routing infrastructure. It does not use preconfigured tunnels. The nodes that are responsible for automatic tunneling use a special address known as an IPv4-compatible address.</li> <li><b>6to4:</b> This allows communication between IPv6 sites using an IPv4 network without an explicit tunnel and communicating with native IPv6 domains using relay routers.</li> <li><b>Teredo:</b> This is an enhancement of the 6 to 4 method and is supported by Windows Server 2008 and Windows Server 2008 R2. It enables NAT devices to attain IPv6 connectivity by using UDP for tunneling of packets. <li><b>Intra-Site Automatic Tunneling Addressing Protocol:</b> It connects IPv6 hosts with the routers over an IPv4 network. It works by using a process that sees the IPv4 network as a link layer for IPv6. It allows viewing of other nodes on the network as potential IPv6 hosts or routers allowing creation of host-to-host, host-to-router, or router-to-host automatic tunnel.</li> </ul> <div class="space"></div> <hr class="mainhr2"> </div> <div id="certhome" class="text"> <h2>Related IT Guides</h2> <ol class="olist2"> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-analyzing-the-ipv6-address-structure.htm">Analyzing the IPv6 Address Structure</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-determine-edition-windows-server-appropriate-for-specific-circumstances.htm">Determine which edition of Windows Server is appropriate for a specific set of circumstances</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-multicast-scheduled-and-automatic-deployment.htm">Multicast, Scheduled, and Automatic Deployment</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-plan-for-the-installation.htm">Plan for the installation of or upgrade to Windows Server 2008 or Windows Server 2008 R2</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-planning-an-ipv6-network.htm">Planning an IPv6 Network</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-planning-windows-server-2008-windows-server-2008-r2.htm">Planning Windows Server 2008 and Windows Server 2008 R2 DNS</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-using-ipv6-tools.htm">Using IPv6 Tools</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-windows-deployment-services.htm">Windows Deployment Services</a></li> <li><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guide-70-646-windows-server-2008-r2-answer-files.htm">Windows Server 2008 R2 Answer Files</a></li> </ol> <div class="space"></div> </div> </div> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/lgreybot.png" width="720" height="10" class="png"/></div> </div> <div id="right"> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/rguartop.png" width="260" height="4" class="png"/></div> <div class="inner-right"> <div class="rguar"> <h4 class="grey text-cntr">Money Back Guarantee</h4> <p><img src="/web/20170615182243im_/http://www.test-king.com/design/images/guary.png" width="85" height="78" class="fl-lft png" alt="Guarantee" title="Money Back Guarantee"/> Test-King has a remarkable Candidate Success record. We're confident of our products and provide a no hassle money back guarantee.</p> <div class="pop-txt"> <a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guarantee.htm">How The Guarantee Works?</a> </div> <div class="clear"></div> </div> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/rgap.png" width="258" height="5" class="png"/></div> <div class="rbox" id="cust"> <h4 class="text-cntr">Test-King Valuable Customers</h4> <p>Test-King is the world's largest certification preparation company with <span class="bold">99.6%</span> Pass Rate History from <span class="bold">43147+</span> Satisfied Customers in <span class="bold">145</span> Countries.</p> </div> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/rgap.png" width="258" height="5" class="png"/></div> <div class="rbox" id="secure"> <h4 class="text-cntr">Secure Shopping Experience</h4> <p class="text-cntr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/cards.png" width="193" height="23" alt="We accept Visa, Maestro..." title="We accept Visa, Maestro..." class="png"/></p> <p>Your purchase with Test-King is safe and fast. Your products will be available for immediate download after your payment has been received.</p> <p>The Test-King website is protected by 256-bit SSL from McAfee, the leader in online security.</p> <table cellpadding="0" cellspacing="0" border="0" width="100%"> <tr> <td width="50%" class="valign-top text-cntr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/headers/20170615-2.png" width="93" height="57" class="marg-cntr png" alt="Mcafee Secure" title="Mcafee Secure"/></td> <td width="50%" class="valign-top text-cntr"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/bbb.png" width="109" height="45" class="marg-cntr png" alt="Accredited Business" title="Accredited Business"/></td> </tr> </table> </div> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/rgap.png" width="258" height="5" class="png"/></div> <div class="help"> <p class="bold">Need help assistance? Contact us!</p> <a href="https://web.archive.org/web/20170615182243/mailto:support@test-king.com">Customer Support</a> </div> </div> <div class="forimg"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/rhelpbot.png" width="260" height="5" class="png"/></div> </div><div class="clear"></div> </div> <div class="spacer"></div> </div> <div id="footer"> <div class="inner-foot"> <div class="fmenu"><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/">Home</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/samples.htm">Samples</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/it-guides.htm">IT Guides</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/guarantee.htm">Guarantee</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/testimonials.htm">Testimonials</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/contactus.htm">Contact Us</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/aboutus.htm">About Us</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/disclaimer.htm">Disclaimer</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/privacy.htm">Privacy</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/terms.htm">Terms</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/careers.htm">Career</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/partner.htm">Partner</a><span>|</span><a href="https://web.archive.org/web/20170615182243/http://www.test-king.com/sitemap.htm">Sitemap</a></div> <div class="copyr">© All Rights Reserved 2002-2017 Test-King.com. Test-King.com Materials do not contain actual questions and answers from Cisco's Certification Exams.</div> </div> </div> <script type="text/javascript"> document.getElementById('loginhref').onclick = function( e ) { var logincont = document.getElementById('loginBox'); e = e || window.event; if (logincont.style.display == 'block') { logincont.style.display = 'none'; } else { logincont.style.display = 'block'; document.forms['loginboxForm'].elements['login'].focus(); } if (e.stopPropogation) { e.stopPropagation(); } else { e.cancelBubble = true; } return false; } document.onclick = function( e ) { var logincont = document.getElementById('loginBox'); e = e || window.event; if ((e.target || e.srcElement)!== logincont ) { logincont.style.display = 'none'; } } $('#loginBox').click(function(e){e.stopPropagation();}); //--> </script> <noindex>  <div id="offer1" class="white_content"> <a href="" onclick="setCookie('bShowPopup102',1,90);setCookie('bPromoStripe2',1,14);document.getElementById('offer1').style.display='none';document.getElementById('offer1_fade').style.display='none';return false;"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/closenp.png" alt="Close" title="Close" width="28" height="28" class="npclose"/></a> <div id="offer"> <h3>Summer Sale! <span class="disc">30% Discount</span> for All Exams!</h3> <div class="space"></div> <p class="fs18">This is a <span class="bold">ONE TIME OFFER</span>. You will never see this Again</p> </div> <div id="loffer">Instant Discount <br/> <img src="/web/20170615182243im_/http://www.test-king.com/design/images/iproduct.png" width="242" height="188" alt="Test-King Testing Engine"></div> <div id="roffer"> <p class="off">30% OFF</p> <p class="bold">Enter Your Email Address to Receive Your 30% OFF Discount Code Plus... Our Exclusive Weekly Deals</p> <div class="error_message" id="subErr" style="display:none">Please enter your email to Get Your Discount Code</div> <form method="post" action="" onsubmit="return subFormVerify();" name="subForm"> <input type="hidden" name="act" value="promoSubscribe"> <input type="text" name="email" value="Enter Your Email Address:" onfocus="if (this.value=='Enter Your Email Address:') this.value='';" id="inp-text"> <p class="fs11">A confirmation link will be sent to this email address to verify your login.</p> <input type="image" src="/web/20170615182243im_/http://www.test-king.com/design/images/but-getcode.png" alt="Get Your Discount Code" title="Get Your Discount Code" width="236" height="44"/> <br/><p class="fs11">* We value your privacy. We will not rent or sell your email address.</p> </form> </div> <div class="clear"></div> </div> <div id="offer1_fade" class="black_overlay"></div>  <div id="offer2" class="white_content"> <a href="" onclick="document.getElementById('offer2').style.display='none';document.getElementById('offer2_fade').style.display='none';return false;"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/closenp.png" alt="Close" title="Close" width="28" height="28" class="npclose"/></a> <div id="offer"> <h2>Your <span class="disc">30% Discount</span> on Your Purchase</h2> <p class="fs20">Save <span class="bold">30%</span>. Today on all IT exams. Instant Download</p> </div> <div id="loffer"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/iproduct.png" width="242" height="188" alt="Test-King Testing Engine"></div> <div id="roffer" class="padt10"> <p class="bold fs15">Use the following Discount Code during the checkout and get 30% discount on all your purchases:</p> <a href="" onclick="document.getElementById('offer2').style.display='none';document.getElementById('offer2_fade').style.display='none';return false;"><img src="/web/20170615182243im_/http://www.test-king.com/design/images/but-startshop.png" width="166" height="44" alt="Start Shopping" title="Start Shopping"/></a> </div> </div> <div id="offer2_fade" class="black_overlay"></div> <script type="text/javascript">  </script> </noindex> </body> </html>