{"id":14403,"date":"2025-02-06T15:18:51","date_gmt":"2025-02-06T07:18:51","guid":{"rendered":"https:\/\/mvslinks.com\/?p=14403"},"modified":"2025-02-26T15:53:36","modified_gmt":"2025-02-26T07:53:36","slug":"ipv4-vs-ipv6-whats-the-difference","status":"publish","type":"post","link":"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/","title":{"rendered":"IPv4 vs IPv6: What&#8217;s the Difference"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabela de conte\u00fado\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#1_Introduction\" >1.\u00a0Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#2_Overview_of_IPv4\" >2.\u00a0Overview of IPv4<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#1_Definition_and_Development\" >(1)\u00a0Definition and Development<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#2_Address_Format\" >(2)\u00a0Address Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#3_Address_Classification\" >(3)\u00a0Address Classification<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#3_Overview_of_IPv6\" >3.\u00a0Overview of IPv6<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#1_Definition_and_Development-2\" >(1)\u00a0Definition and Development<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#2_Address_Format-2\" >(2)\u00a0Address Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#3_Address_Classification-2\" >(3)\u00a0Address Classification<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#4_Transition_Technologies\" >4.\u00a0Transition Technologies<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#1_Dual_Stack\" >(1)\u00a0Dual Stack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#2_Tunneling\" >(2)\u00a0Tunneling<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#3_NAT_DNS\" >(3)\u00a0NAT \/ DNS<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#5_IPv4_vs_IPv6\" >5.\u00a0IPv4 vs IPv6<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#1_Main_differences\" >(1)\u00a0Main differences<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#2_Advantages_and_Disadvantages_of_IPv4\" >(2)\u00a0Advantages and Disadvantages of IPv4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#3_Advantages_and_Disadvantages_of_IPv6\" >(3)\u00a0Advantages and Disadvantages of IPv6<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#4_Why_IPv4_Is_Still_in_Use\" >(4)\u00a0Why IPv4 Is Still in Use?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/ipv4-vs-ipv6-whats-the-difference\/#6_Summary\" >6.\u00a0Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_Introduction\"><\/span>1.\u00a0<strong>Introduction<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In the digital area, the Internet is the foundation of global life and economy, and all networked devices need a unique IP (Internet Protocol) address, as their \u201cidentity card\u201d to communicate. IPv4 is an earlier version of IP address while IPv6 is the latest version. In short, IP address helps devices around the world find each other correctly and then transmit data. So, IPv4 vs IPv6, what are the specific differences between them? Why do we need to transit from IPv4 to IPv6? This article will analyze the characters, development status of IPv4 and IPv6.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_Overview_of_IPv4\"><\/span>2.\u00a0<strong>Overview of IPv4<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Definition_and_Development\"><\/span>(1)\u00a0<strong>Definition and Development<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IPv4 (Internet Protocol Version 4) is a widely used IP protocol currently. Since its inception in 1981, it has become the basis of global Internet communication, offering unique addresses for devices, so that data can be transmitted accurately.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Address_Format\"><\/span>(2)\u00a0<strong>Address Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IPv4 adopts 32-bit addresses, typically represented in dotted decimal format, \u201c192.168.1.1\u201d\u00a0for example. It can provide approximately 4.3 billion unique addresses in total.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-14406\" src=\"https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv4.jpg\" alt=\"IPv4\" width=\"1200\" height=\"600\" srcset=\"https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv4.jpg 1200w, https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv4-500x250.jpg 500w, https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv4-768x384.jpg 768w, https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv4-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Address_Classification\"><\/span>(3)\u00a0<strong>Address Classification<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IPv4 addresses are divided into five classes: A, B, C, D, E. In these, Classes A, B, and C are used for general networking, Class D is designed for multicast, and Class E is reserved for experiments.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_Overview_of_IPv6\"><\/span>3.\u00a0<strong>Overview of IPv6<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Definition_and_Development-2\"><\/span>(1)\u00a0<strong>Definition and Development<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IPv6 (Internet Protocol Version 6) is a new generation internet protocol, designed to solve the exhaustion of IPv4 addresses. In 1998, IETF proposed IPv6, providing a larger address space and optimizing network performance, security and management to adapt to the future development of the Internet.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Address_Format-2\"><\/span>(2)\u00a0<strong>Address Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IPv6 uses 128-bit addresses, represented in hexadecimal and separated by colons, such as \u201c2001:db8::8a2e:370:7334\u201d. \u00a0It offers 2\u00b9\u00b2\u2078\u00a0addresses, far more than IPv4.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-14407\" src=\"https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv6.jpg\" alt=\"IPv6\" width=\"1200\" height=\"600\" srcset=\"https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv6.jpg 1200w, https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv6-500x250.jpg 500w, https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv6-768x384.jpg 768w, https:\/\/mvslinks.com\/wp-content\/uploads\/2025\/02\/IPv6-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Address_Classification-2\"><\/span>(3)\u00a0<strong>Address Classification<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Unicast. Used for one-to-one communication between devices. For instance, computers request web content from servers, meanwhile the server responds only to the specific request.<\/p>\n<p>Multicast. Support one-to-many data transmission. In online streaming, all views can receive the same data.<\/p>\n<p>Anycast. The same address can be assigned to multiple devices, then data will be sent automatically to the nearest target, improving efficiency. When you access a website, you are next directed to the closet server to speed up loading times.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4_Transition_Technologies\"><\/span>4.\u00a0<strong>Transition Technologies<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Since IPv4 and IPv6 can\u2019t interoperable directly, networks require some transition technologies to ensure a smooth upgrade The key methods include Dual Stack, Tunneling, NAT\/DNS<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Dual_Stack\"><\/span>(1)\u00a0<strong>Dual Stack<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Concept<\/b><\/strong>. Devices and networks run both IPv4 and IPv6, and select the suitable protocol based on the target.<\/p>\n<p><strong><b>Characteristics<\/b><\/strong>.<\/p>\n<ul>\n<li>Supports both IPv4 and IPv6 without protocol translation, ensuring high communication efficiency.<\/li>\n<li>Requires network devices to support dual protocols, enhancing management complexity.<\/li>\n<\/ul>\n<p><strong><b>Applications<\/b><\/strong>. Widely used in ISPs, data centers and enterprise networks, to facilitate IPv6 migration.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Tunneling\"><\/span>(2)\u00a0<strong>Tunneling<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Concept<\/b><\/strong>. Encapsulates IPv6 data packets in IPv4 network, or encapsulates IPv4 data packets in IPv6 network, allowing networks running different IP protocols to communicate with each other.<\/p>\n<p><strong><b>Common Tunneling Technologies<\/b><\/strong>.<\/p>\n<ul>\n<li>Encapsulates IPv6 data packet within IPv4, automatic configuration, ideal for dynamic addressing environments.<\/li>\n<li>Teredo. Applicable for devices behind NAT, enabling IPv6 to traverse IPv4 networks.<\/li>\n<\/ul>\n<p><iframe title=\"What is NAT (Network Address Translation)?\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/057e8J-48nY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<ul>\n<li>GRE, IP-in-IP. Used in enterprises and ISP networks, supporting customized tunnel configurations.<\/li>\n<\/ul>\n<p><strong><b>Advantages<\/b><\/strong>. No need to upgrade all network devices, enabling a gradual IPv6 deployment.<\/p>\n<p><strong><b>Disadvantages<\/b><\/strong>. Increases encapsulation cost, which may impact network performance.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_NAT_DNS\"><\/span>(3)\u00a0<strong>NAT \/ <\/strong><a href=\"https:\/\/www.youtube.com\/watch?v=057e8J-48nY\" target=\"_blank\" rel=\"noopener\"><strong>DNS<\/strong><\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>https:\/\/www.techtarget.com\/searchnetworking\/definition\/domain-name-system<\/p>\n<p><strong><b>Concept<\/b><\/strong>. Enables IPv6 devices to access IPv4 resources, suitable for IPv6-only networks.<\/p>\n<p><strong><b>NAT<\/b><\/strong>, namely, Network Address Translation. By translating addresses, NAT maps IPv6 addresses to IPv4 addresses, allowing IPv6 devices to access IPv4 serves. NAT enables multiple devices on a local network to share a single public address, thus helping protect the limited IPv4 address space. IPv6 doesn\u2019t need NAT, so it reduces translation overhead, while expanding the address space from 32 bits to 128 bits.<\/p>\n<p><strong><b><a href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/dns-vs-dhcp-which-is-better\/\">DNS<\/a><\/b><\/strong>, namely, Domain Address Translation. It translates domain names into IP addresses. In IPv6-only networks, DNS generates a synthetic IPv6 address, and access IPv4 servers via NAT.<\/p>\n<p><strong><b>Advantages<\/b><\/strong>. Ideal for IPv6-only networks, and no need for user-side configuration modification.<\/p>\n<p><strong><b>Disadvantages<\/b><\/strong>. Only supports IPv6\u2019s access to IPv4, and reverse communication is limited.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"72\">Technologies<\/td>\n<td width=\"134\">Affect<\/td>\n<td width=\"149\">Applications<\/td>\n<td width=\"211\">Advantages &amp; Disadvantages<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">Dual Stack<\/td>\n<td width=\"134\">Run both IPv4 and IPv6.<\/td>\n<td width=\"149\">Networks gradually transitioning IPv6.<\/td>\n<td width=\"211\">Great compatibility, but complex management.<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">Tunneling<\/td>\n<td width=\"134\">Encapsulates data packets in IPv4\/IPv6 networks.<\/td>\n<td width=\"149\">Networks crossing networks with different protocols.<\/td>\n<td width=\"211\">No need to change the underlying network, but increases encapsulation overhead.<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">NAT \/ DNS<\/td>\n<td width=\"134\">Allow IPv6-only devices to access IPv4 resources.<\/td>\n<td width=\"149\">IPv6-only networks.<\/td>\n<td width=\"211\">Suitable for IPv6-only development direction, but only supports one-way communication.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"5_IPv4_vs_IPv6\"><\/span>5.\u00a0<strong>IPv4 vs IPv6<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Main_differences\"><\/span>(1)\u00a0<strong>Main differences<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"118\">Feature<\/td>\n<td width=\"208\">IPv4<\/td>\n<td width=\"241\">IPv6<\/td>\n<\/tr>\n<tr>\n<td width=\"118\">Address Length<\/td>\n<td width=\"208\">32-bit, approximately 4.3 billion addresses.<\/td>\n<td width=\"241\">128-bit, approximately 340 undecillion addresses.<\/td>\n<\/tr>\n<tr>\n<td width=\"118\">Address Format<\/td>\n<td width=\"208\">4 decimal numbers, separated by dots.<\/td>\n<td width=\"241\">8 hexadecimal numbers, separated by colons.<\/td>\n<\/tr>\n<tr>\n<td width=\"118\">Address Allocation<\/td>\n<td width=\"208\">Static and dynamic allocation (<a href=\"https:\/\/mvslinks.com\/pt\/news\/blog\/dns-vs-dhcp-which-is-better\/\" target=\"_blank\" rel=\"noopener\">DHCP<\/a>).<\/td>\n<td width=\"241\">Supports Stateless Address Auto Configuration (<a href=\"https:\/\/www.youtube.com\/watch?v=P59k281Ah8s\" target=\"_blank\" rel=\"noopener\">SLAAC<\/a>).<\/td>\n<\/tr>\n<tr>\n<td width=\"118\">Built-in Security<\/td>\n<td width=\"208\">None, requires additional configuration.<\/td>\n<td width=\"241\"><a href=\"https:\/\/networklessons.com\/security\/ipsec-internet-protocol-security\" target=\"_blank\" rel=\"noopener\">IPsec<\/a> support.<\/td>\n<\/tr>\n<tr>\n<td width=\"118\"><a href=\"https:\/\/www.techtarget.com\/searchunifiedcommunications\/definition\/QoS-Quality-of-Service\" target=\"_blank\" rel=\"noopener\">QoS<\/a><\/td>\n<td width=\"208\">Limited flexibility.<\/td>\n<td width=\"241\">Efficient and precise traffic management.<\/td>\n<\/tr>\n<tr>\n<td width=\"118\">Routing Efficiency<\/td>\n<td width=\"208\">Larger routing tables so complex management.<\/td>\n<td width=\"241\">Smaller routing tables hence efficient management.<\/td>\n<\/tr>\n<tr>\n<td width=\"118\">Compatibility<\/td>\n<td width=\"208\">Widely compatible, supports almost all devices.<\/td>\n<td width=\"241\">New protocol, needs transition technologies for compatibility.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"2_Advantages_and_Disadvantages_of_IPv4\"><\/span>(2)\u00a0<strong>Advantages and Disadvantages of IPv4<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"284\">Advantages<\/td>\n<td width=\"284\">Disadvantages<\/td>\n<\/tr>\n<tr>\n<td width=\"284\"><strong>Mature &amp; Stable<\/strong>. Widely used with mature technology.<\/p>\n<p><strong>High Compatibility<\/strong>. Supports almost all devices, and easy to connect with existing infrastructure.<\/td>\n<td width=\"284\"><strong>Limited Addresses<\/strong>. Only provides approximately 4.3 billion addresses, insufficient for demand.<\/p>\n<p><strong>Allocation Challenges<\/strong>. Limited addresses so complex management.<\/p>\n<p><strong>No Built-in Security<\/strong>. Requires additional security protocols.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"3_Advantages_and_Disadvantages_of_IPv6\"><\/span>(3)\u00a0<strong>Advantages and Disadvantages of IPv6<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"284\">Advantages<\/td>\n<td width=\"284\">Disadvantages<\/td>\n<\/tr>\n<tr>\n<td width=\"284\"><strong>Vast addresses<\/strong>. Offers a huge address space, thus solving the address shortage problem.<\/p>\n<p><strong>Built-in Security<\/strong>. Includes encryption and authentication, enhancing security.<\/p>\n<p><strong>Automatic Configuration<\/strong>. Supports devices in getting addresses automatically, simplifying setup.<\/p>\n<p><strong>Simplified Routing<\/strong>. Concise routing tables enable higher efficiency.<\/td>\n<td width=\"284\"><strong>Compatibility Issues<\/strong>. Not compatible with IPv4.requiring transition technologies.<\/p>\n<p><strong>Complex Deployment<\/strong>. Need time and resources for upgrading.<\/p>\n<p><strong>Learning Time<\/strong>. New technology and address format require adaptation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"4_Why_IPv4_Is_Still_in_Use\"><\/span>(4)\u00a0<strong>Why IPv4 Is Still in Use?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Compatibility<\/b><\/strong>. IPv4 is widely used, consequently needing time and resources for replacement.<\/p>\n<p><strong><b>Cost &amp; Complexity<\/b><\/strong>. IPv6\u2019s employment involves high costs and complex technologies.<\/p>\n<p><strong><b>Address Management<\/b><\/strong>. Through NAT, IPv4\u2019s short-term address shortages can be alleviated.<\/p>\n<p><strong><b>Transition Issues<\/b><\/strong>. IPv4 and IPv6 are not directly compatible, and transitioning requires additional technologies.<\/p>\n<p><strong><b>Existing Demands<\/b><\/strong>. Various devices and applications still can run properly within IPv4.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"6_Summary\"><\/span>6.\u00a0<strong>Summary<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IPv4 and IPv6 are two core protocols in global internet communication. IPv4 is stable with great compatibility, but addresses are limited. In contrast, IPv6 offers a larger address space and built-in security, meeting future development. Although IPv6 is becoming more popular, IPv4 is still dominant. Furthermore, the two protocols need to be used in parallel during the transition process.<\/p>\n<p>IPv4 guarantees the stable operation of networks, while IPv6 provides a solution for future network expansion. As the number of devices grows, understanding their differences and transition technologies is crucial to the continued development of the network.<\/p>","protected":false},"excerpt":{"rendered":"<p>1.\u00a0Introduction In the digital area, the Internet is the foundation of global life and economy, and all networked devices need a unique IP (Internet Protocol) address, as their \u201cidentity card\u201d to communicate. IPv4 is an earlier version of IP address while IPv6 is the latest version. 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