What Is The Difference Between IPv4 and IPv6?

Finding someone who does not use the Internet nowadays would be impossible. And if you use the internet, you might have heard about IP addresses.

We are in the 6th version of the IP address protocol, which is called IPv6. IPv6 was launched almost 2 decades back.

But still, many people do not use iPv6. Does that mean IPv6 is bad?

Let’s find out the answer and figure out the Difference Between IPv4 And IPv6 in this article.

What Is An IP Address?

The full form of IP is Internet Protocol. An IP address is nothing but an array of numbers assigned to a device to communicate with another device over the internet.

It’s a technical format and addressing scheme to address a device connected to the internet.

Let’s take a simple example. You have a phone, inserted a SIM into it, and a network in it. But if your SIM does not have a number allocated, will someone be able to contact you? No.

The same logic applied to the internet world. Without an IP address, you can not communicate with other devices in the world of the internet.

Every IP address follows some standards reflected in different IP versions (IPV). At present, we are using IP version 4 ( IPv4) and IP version 6 ( IPv6)

What Is My IP?

To check your IP on a Windows OS computer, you can type cmd in the search bar and go to the command prompt window. You must type in the following command to see your IP address there.

ipconfig/all

Types Of IP Addresses

There are four types of IP addresses.

• Private IP
• Public IP
• Static IP
• Dynamic IP

A private IP address is used to communicate inside a network. It is the IP address that a router gives to all devices that are connected to it.

A public IP address can be accessed directly over the Internet and assigned to your network router by your Internet Service Provider (ISP)

A static IP address is manually created and does not change.

However, Dynamic IP addresses are assigned by the Dynamic Host Configuration Protocol (DHCP) and are subject to change after a certain period. Once the dynamic IP has expired, you have to request a new IP.

What Is A Domain Name?

We know that every device has an IP address to communicate. So, if you want to contact a device on the internet, you must know its IP address. But is it possible to memorize trillions of IP addresses?

No. It’s not possible. That’s why we use domain names that are easy to remember. Like how we save phone numbers with names, Domain name saves the IP address.

When you browse a website ( Domain name), you are asked to connect to an IP address associated with that domain name.

What Is IPv4?

IPv4 is the internet protocol version 4, which provides a 32-bit numerical number for each device connected to the internet.

It is written in decimal format and has 4 numbers separated by periods. Each number can be between 0 to 255. A sample IPv4 address is shown below.

167.0.0.1

Since IPv4 follows a 32-bit numeric system, there can be approximately 4.3 billion unique IPv4 addresses.

What Is IPv6?

IPv6 is a 128-bit IP address system. It follows a colon that separates the hexadecimal numbering system and 8 numbers.

Since IPv6 follows a 128-bit system, it can have approximately 3.4×10³⁸ unique IPv6 addresses.

2605:a000:1123:61cb:ec88:ccb0:3381:6619

Why Do We Need IPv6?

We are running out of IPv4. As I said, we can have a maximum of 4.3 billion IPv4 addresses. The number is less if you compare the total number of internet users. But still, we get a unique IPv4 address.

How?

It’s because not every device over the internet is allocated a unique IP address. Instead, the router gets a unique IP address, and all devices connected to that router share the same address.

However, in an ideal scenario, all devices should have a unique IP address, and IPv6 can do that. The reason is that Ipv6 has almost infinite numbers to allocate.

Difference Between IPv4 and IPv6

Apart from unlimited unique IP addresses in IPv6, there are some differences between IPv4 and IPv6, as mentioned below.

End To End Connectivity

Since all devices will get a unique IP address, end-to-end connections are possible in IPv6. Presently, only routers get IP addresses in IPv4, and all devices connected to that router share the same IP address.

No Geographical Monopoly

50% of IP addresses were owned by the United States when it was launched. IPv6 does not favor any country and will be available across a wider geographical periphery.

Security Enhancement

IPv6 is considered more secure due to the Internet Control Message Protocol (ICMP) than IPv6. Firewall configuration and other security measures are improved in IPv6.

Automatic Configuration

Every device gets an IP address, so auto-configuration is possible. For every device, the IPv6 address is generated from the machine address, which is unique to every device.

Is iPv6 Better Than IPv4

Apart from offering almost unlimited unique IP addresses, IPv6 offers no deal-breaker features. That is why IPv6 is still not that popular. Here are some of the other reasons.

• We still have some IPv4 addresses left out. Let’s use those before we move to IPv6.
• IPv6 does not offer backward compatibility. For example, if your website uses IPv6 but your router and ISP still use IPv4, you can’t access that website.
• IPv6 does not support VPNs. If you try to access a website on IPv6 through a VPN, either your request will be ignored, or the VPN will try to route that using some external DNS
• IPv6 does not offer monetary benefits to web hosts. There are no direct benefits that companies will get if they implement IPv6. So, they stay away from investing money in IPv6 until there is a need.

Conclusion: Difference Between iPV6 and iPV4

The trend is changing nowadays, and more web hosts are supporting IPv6. Since IPv6 does not offer direct significant benefits, users are still not ready to move. Hopefully, IPv6 will overcome its drawbacks, attracting people to migrate to IPv6.

That’s all we have in this article. Hope you liked the article and found some useful information. If you have any queries, please write in the comment section, and I will be happy to answer.

Here is a nice video explaining the differences between IPv4 and IPv6.

FAQ | Difference Between IPv4 and IPv6