What is IPv4 vs IPv6 – Full Information of Internet Protocols


Have you ever heard of IPv4 or IPv6? How would you feel that the Internet is now going through the tightness of internet address. You may have also heard that the last block of IPv4 internet addresses has just been allocated now.

If you have guessed so far, then I will clarify to you that I am talking about the underlying technology that runs Internet Protocol Addresses. Yes, he is called IP address. Which are numbered from the beginning of the internet and are going to end soon. Which is now a matter of concern.

Very soon a new technology is going to replace it, which is called IPv6. IPv6 is also called the successor of IPv4. This new technology will not only give us more numerical addresses, but its use will also address addressments and network security will also be quite easy. But the transition of IPv6 from IPv4 may be a bit rough and challenging.

People do not have information about these two technologies. So today I thought why you should be given full information about people of IPv4 and IPv6 so that you can know about the difference between IPv4 and IPv6 correctly. First of all, let’s know what the Internet Protocol is.

What is Internet Protocol (IP)?


The full form of the IP is Internet Protocol. It describes the technical format about how data packets are processed and communicated in the network with the help of the addressing scheme of computers. Almost all Network IPs are also known as Transmission Control Protocol (TCP), which are called the Transmission Control Protocol (TCP), by connecting with the IP, the virtual connection creates a destination connection between the destination and the source.

If I explain to you by giving an example then you will probably get more understanding. IP is similar to our Indian Postal System in which this datagram is sent to be an already encapsulated and then sent to a system via a sender. But there is no direct link between Sender and Receiver.

The package (datagram) is divided into many parts, but in all parts the address of the Destination Host remains. And over time, each part reaches the receiver, but in different ways and different times. It determines the postal system about the routines and times, which is called the IP here. But the Postal System (Transport and Application layers here) combines all the parts together to deliver to the Destiver Host in the right time. At TCP / IP, both establish connections between Hosts so that they can exchange messages between each time for a time period.

What are Internet Protocol Versions?

If we talk about the time now, then there are currently two versions of Internet Protocol, which are IPv4 and IPv6. IPv6 is an evolutionary upgrade in the technology of Internet Protocol. In the current condition where there is a lot of demand for IPv6, IPv6 will coexist with the old IPv4 for some time.

What is IPv4?

IPv4 (Internet Protocol Version 4) is the fourth revision of Internet Protocol (IP) and it is used to identify the device through the addressing system in the network. Internet Protocol is designed in such a way that it can be used in interconnected systems of packet-switched computer communication networks.

IPv4 is used most to connect devices to the Internet according to the Internet protocol. 32-bit address scheme is used in IPv4 which allows 2 ^ 32 addresses (and which has approximately 4 billion addresses). But as the Internet is growing, it is estimated that slowly the 4 addresses will be lost, because they are being used today in all devices such as computers, smartphones and game consoles, and all these devices are available on the Internet. An address is needed to be connected.

What is IPv6?

A new Internet addressing system has been introduced to address these shortcomings of IPv4 and is known as Internet Protocol version 6 (IPv6) and can prove useful in meeting the shortage of Internet addresses.

IPv6 (Internet Protocol Version 6) is also called IPng (next generation) and this new version is Internet Protocol (IP). To review it, IETF standards committees have been used so that they can replace IPv4 (Internet Protocol Version 4) altogether.

IPv6 is considered to be the successor of Internet Protocol Version 4 (IPv4). It is specially designed as an upgraded version of Mehjuda Internet Protocol so that it can coexist with IPv4 for some time. The design of IPv6 has been done in such a way that to help the internet grow steadily, both of the number of hosts connected and full volume data traffic transmitted help to grow properly.

IPv6 is also known as “next generation” Internet standard and it was under development since mid 1990. IPv6 was created because people thought that the demand for IP address is increasing, the day is not far when IP addresses are completely broken.

The Benefits of IPv6

By the way IPv6 will help a lot in increasing the pool of addresses and there is more discussion among people, but there are many such technological changes along with IPv6 in which the IP protocol is more main.

  • No need to do NAT (Network Address Translation)
  • Auto-configuration
  • Private address collisions will no longer be
  • Better multicast routing
  • Simpler header format
  • Being Simplified, more efficient routing
  • True quality of service (QoS), also called “flow labeling”
  • Built-in authentication and privacy support
  • Flexible options and extensions
  • Having Easy Administration (DHCP not required)

How does IPv4 and IPv6 work?

  1. IPv4 uses 32 bits long (4 bytes) address, colon is used to divide 128 bits of address in IPv6 and with this it is separated with 8 16-bit hexadecimal blocks. For example, 2dfc:0:0:0:0217:cbff:fe8c:0.
  2. IPv4 addresses are divided into “classes” and where Class A networks are available for some huge networks, Class C networks for thousands of small small networks, and Class B networks for both of them. In IPv6 subnetting is used to adjust the network sizes and also to a specific address space assignment.
  3. IPv4 uses class-type address space to multicast ( The IPv6 uses an integrated address space for multicast, at FF00 :: / 8.
  4. IPv4 uses “broadcast” addresses so that each device can be forced to shut down and see those packets. That is why IPv6 uses multicast groups.
  5. IPv4 uses an unspecified address to appear, and for class-type address ( loopback. But uses IPv6 :: and ::1 for unspecified and for loopback address.
  6. IPv4 globally uses unique public addresses for traffic and “private” addresses. At the same time, IPv6 globally uses unique unicast addresses and local addresses (FD00::/8).

Difference between IPv4 and IPv6

IPv4 IPv6
Packet size: 576 bytes required and fragmentation optional Packet size: 1280 bytes required and without fragmentation
Packet fragmentation: Routers and sending hosts Packet fragmentation: Sending hosts only
IPv4 does not have much security as IPv4 was never built with security considerations It was originally designed for the isolated military network
After this adapted for the public educational and research network IPv6 was built with strong security from the beginning with the addition of – Encryption – Authentication facility.
IPv4 header contains 20 bytes and IPv4 header contains many fields (13 fields) IPv6 header just is double because it contains 40 bytes and IPv6 header contains fewer fields such as 8 fields.
The ISP has IPv4 connectivity, or then connects to both IPv4 and IPv6 There are not many IPv6 connectivity in many ISPs
Contains non equivalent geographical distribution (> 50% USA) There is no geographic limitation in it

Why is IPv4 addresses going to end?

IPv4 uses 32 bits for your Internet addresses. Which means that it can support IP addresses in total up to 2^32 – which is around 4.29 billion. It may seem very appealing, but today almost 4.29 billion IP addresses have been given to various institutions, which can show the lack of IP address in the coming time. Keeping in mind this situation, IPv6 is being brought to the earliest.

How will IPv6 solve this problem?

As I have said before, IPv6 uses 128-bit Internet addresses. Therefore, it can support approximately 2 ^ 128 Internet addresses – 340, 282, 366, 920, 938, 000, 000, 000, 000, 000, 000, 000, 000, if we talk about its exact value. And these are really many addresses compared to IPv4. These are so many addresses that we have to use the hexadecimal system to display these addresses. Or say that there are so many IP addresses in IPv6 that allow Internet to be operational for a long time.

So why can not we switch directly?

It is such that the point of termination of the IPv4 addresses had been predicted over the years, due to which the switching progress was started from the last decade. But this work can not be haste, so this work is going on slowly. With this, both IPv4 and IPv6 run simultaneously in parallel networks – and need a special gateway to exchange data between the two.

And to switch such as this, software and routers have to be changed so that they can support more advanced networks. It requires both time and money. Therefore, these processes can not be done directly, but they can be changed gradually.

What will happen to you from this change?

Initially, they can not make big impact in our lives. As of nowadays, most modern devices and Operating Systems actually support IPv6. But still there are so many routers and servers that do not support them, so it is very difficult to connect to the device and the Internet.

IPv6 is still in its initial stage, which has many bugs and security issues. And in order to function properly, these problems will have to be fixed, otherwise there will be major problems in the future. Nobody has any sense about the expenditure and time spent in this change, but scientists say that this change may take some more time now.

The future of IPv6

Changes in IPv6 can be seen in significant changes in the time to come. Because of the problem of IP addresses, if this is the problem of network security, then IP is going to be even better in all places. With the help of more address, more devices can be added together. Mobility and MultiHoming can also be found.

Mobility means changing from one network to another, without changing the IP address. Well MultiHoming means that more than one time connected with ISP, so that if there are any problems in any connection, it can be easily transferred to another connection. Many such changes can be seen in the coming time.

I sincerely hope that I gave you complete information about what people are doing IPv4 and IPv6 and I hope you have understood people about IPv4 and IPv6. I am convinced of all the readers that you too share this information with your neighbors, relatives, your friends, so that we will be aware of our interactions and will all benefit from it. I need people’s support from you so that I can bring you even more new information.

My always try is to do that I always help my readers or readers on every side, if you have any doubt of any kind, then you can ask me uncomfortable. I will definitely try to solve those Doubts. Please tell us how you wrote this article on how IPv4 and IPv6 have been written so that we also have the chance to learn something from your thoughts and improve something.

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