As mentioned in the article “What is IP?”, IPv6 is currently the latest version of IP addresses. Currently, access devices need to own a separate IPv6 address.

Watching: What is IPv6

IPv6 is the latest communication protocol today, developed to replace the previous IPv4 protocol

Let’s briefly summarize the concept of what an IP address is!

IP stands for InteProtocol is a digital address that every device connected to the network has to share data with other devices through the Internet connection protocol. Standard IP addresses are formatted with 4 other groups of numbers. together. They are limited from 0 to 255 separated by periods.

IPv6 protocol developed by IETF and approved by Intecho Corporation for Domain Names and Numbers (ICANN), with the function of implementing a location system for computers, and routing traffic on the Internet.

History of IPv6

IPv6 was developed by IETF and officially standardized and applied since 1998

Previously, the IPv4 protocol held a “unique” role in the field of network connectivity. The IPv4 protocol is defined as follows:

IPv4 (InteProtocol version 4) is the fourth version in the development of Internet protocols. IP – InteProtocol, is a protocol of the TCP/IP protocol stack belonging to the Internet layer, corresponding to the third layer (network layer). of the OSI model.

However, with the strong explosion of the “Internet revolution” has led to the risks of not ensuring network security as well as lack of access space. If no timely action is taken, the computer will not be able to connect to the network. Therefore, the need to upgrade and improve the protocol system has become urgent.

In the early 1990s, the IETF decided to develop a new protocol. This protocol takes the name IP Next Generation (IPng). By 1998, this protocol was officially successfully standardized and approved by ICANN, allowing market use, and named IPv6 (RFC 1883).

The introduction of IPv6 has solved the inadequacies in the internet system that IPv4 still lacks, thereby creating a leap forward in the digital technology era.

Improvements of IPv6 compared to IPv4

IPv6 protocol has many great improvements compared to IPv4

What are IPv6 enhancements?

IPv6 has outstanding improvements compared to IPv4, first of which is the expansion of the number of access addresses. With IPv4, the access space is 32 bits, which corresponds to 4 billion addresses. To IPv6, the IP space has been expanded, with the number up to 128 bits, many times larger than the “predecessor”.

Besides, IPv6 has other functions such as:

Increased securityIncreased RoutingMuch simpler configuration than IPv4.

What are the benefits of IPv6?

IPv6 is a protocol used more and more popularly because of the great benefits it brings

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IPv6 is the most commonly used protocol today with many special benefits, including:

Expand the access space, with numbers up to 128 bits, corresponding to billions of access addresses. The arrangement of the header format is optimized more reasonably, thereby helping to ensure information security. TCP/IP management process is made easier. Routing, configuration is better and more stable than IPv4. Better support for mobile devices.

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How is IPv6 structured?

A tightly arranged, logical, and logical IPv6 structure with separate division into subgroups

Structure of IPv6

An IPv6 has a structure of 128 bits, and is divided into 8 groups. Each group consists of 16 bits, between groups is separated by a “:”.

An IPv6 address is represented by the following structure: FEDC:BA98:768A:0C98:FEBA:CB87:7678:1111:1080:0000:0000:0070:0000:0989:CB45:345F To shorten this range, people we can omit the leading zero of each group. In case a group contains only zeros, the group will be represented by a “::” sign.

IPv6 is improved and more commonly used than IPv4

Structure of Address Prefixes

An Address Prefixes address is also structurally equivalent to IPv4 CIDR. They are represented as follows: IPv6-address/ prefix-length. In there:

IPv6-address is an IPv6 address with any value.Prefix-length is the number of contiguous bits included in the prefix.

Example: 200F:0:0:AB00::/56 (address has 56 contiguous bits in prefix)

What are the components of IPv6?

An IPv6 address will be divided into 3 main parts

An IPv6 address is divided into 3 parts: site prefix, suID, interface ID.

Site prefix: is the number assigned to the website by an ISP. Accordingly, all computers in the same location will share the same site prefix. Site prefix is ​​intended for sharing as it recognizes your network and allows the network to be accessible from the Internet.SuID: is an element inside a web page, used to describe the site structure of the network. An IPv6 subnet is structurally equivalent to a single subnet such as su of IPv4.Interface ID: has a similar structure to an ID in IPv4. This number uniquely identifies a private host in the network. Interface ID (which sometimes assumed to be a tag) is typically auto-configured based on the MAC address of the network interface. The interface ID can be configured using the EUI-64 format.

An IPv6 address is divided into 3 parts with the structure as shown

For example: With an IPv6 address with the following structure: 2001:0f68:0000:0000:0000:0000:1986:69af, it will include:

Site prefix:2001:0f68:0000SuID: 0000Interface ID: 0000:0000:1986:69af

IPv6 address classification

IPv6 is divided into 3 types: IPv6 Unicast, IPv6 Multicast and IPv6 Anycast. Let Mat Bao learn more about each type below:

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There are 3 different types of IPv6 addresses based on their usage

What is IPv6 Unicast

?Unicast is an address used only on an IPv6 node port. When information is sent through a unicast address, the information is only sent to the node port defined by that address.

What is IPv6 Multicast

?Multicast is the address used on a group of IPv6 ports. When information is sent through a multicast address, this information will be processed by all addresses in the group containing that multicast.

What is IPv6 Anycast

?Anycast is an address used for multiple ports on many different nodes. When information is sent through anycast address, this information will be moved to one of those node ports, usually the closest port.

Instructions to check IPv6 connection

Users can use popular websites to check IPv6 connectivity

Carrier IPv6

IPv6 of personal machine

Users can visit the page: to test the IPv6 connection of the personal machine. In addition, users can also use the address to find basic information about providers, IP addresses or the ability to access IPv6-enabled websites. …

Use IPv6 in URLs

Using IP to access the website will help the website owner avoid the situation of unauthorized users accidentally or intentionally accessing their website.

The DNS server can access the website with a domain name instead of an IP address. But you can still enter an IP address in place of part of a URL. For example, you have registered the domain name matbao with as part of the IP address, 80 being the port name. At this time, you can still access the website using the link

Users can access the website by entering the IPv6 address in the URL. With this method, the URL structure will be http://diachiip:tencong. Note that an IPv6 address contains a lot of “:” signs. Browsers usually consider the “:” sign to open the port. As a workaround, IPv6 addresses are distinguished inside brackets when used as part of a URL. For example, if you used a sample IPv6 address in a URL:

HTTP://<2001:0f68:0000:0000:0000:0000:1986:69af>/Just like being able to specify the port number with IPv4 addresses, you can also specify port numbers when using IPv6 addresses . The port number must come after the same required format as when using IPv4. And outside the brackets. For example, if you want to access the website at the above example IPv6 address on port 80, the input URL will look like this:


When to use IPv6?

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The use of IPv6 shows that businesses keep up with the trend of the times

In the current situation, inte develops very strongly. This leads to an increase in the number of servers and the limitation of IPv4 addresses. In addition, there is a strong explosion of mobile devices connected to the network. It is these things that make the use of IPv6 essential.

How to convert IPv4 to IPv6 and vice versa

For example we have IPv4 address range: To convert IPv4 addresses to IPv6 and vice versa, we will have 2 main ways as follows:

Switch from IPv4 to IPv6 manually

With the above IPv4 address, we divide it into 4 regions, divide each area by 16 and record the following results:

192 : 16 = 12 remainder 0168 : 16 = 10 remainder 825 : 16 = 1 remainder 9234 : 16 = 14 remainder 10

Comparing with the HEX value we have:

A = 10B = 11C = 12D = 13E = 14F = 15

Based on the result of the above calculation, combine the result and the remainder to get: C0A8:19EA

So we will have the IPv6 address of which is C0A8:19EA

IPv4 addresses are only 32bit, while IPv6 addresses are 128bit. That’s why we are missing 96bit. This 96bit is a sequence of 0. Therefore, to write correctly, we will have 2 ways of recording as follows:

How to write in full0000:0000:0000:0000:0000:0000:C0A8:19EA Shorthand way::C0A8:19EA

To convert the IPv6 address back to IPv4 we do the following:

C0 = (12 x 16) + 0 = 192A8 = (10 x 16) + 8 = 16819 = (1 x 16) + 9 = 25EA = (14 x 16) + 10 = 234

So we will have the IPv4 address of C0A8:19EA as

Move IPv4 to IPv6 online

Currently, there are quite a few service websites that support fast IPv4 to IPv6 conversion and vice versa. Readers can refer to some of the following service pages:

Usage is quite simple, you just need to enter the IPv4 or IPv6 address to be converted into the correct converter to be successful.

In the US, since September 2012, the government has requires websites to complete the transition to IPv6. The transition deadline is in 2014. It can be said that the use of IPv6 is to catch up with the trend of the times. Businesses should complete the transition as soon as possible.

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Today, under the expansion of the internet, the use of IPv6 is a necessity for any business as well as an individual. Therefore, enterprises should complete the transition to IPv6 protocol to enjoy more optimal benefits in the new technology era.