What is IPV6? Should I Use IPV6 or IPV4?
If you’ve ever opened your network settings or logged into your router, you’ve probably noticed options for IPv4 and IPv6. While most people use the internet every day without thinking about these terms, they play a major role in how devices communicate online.
Every smartphone, laptop, desktop, gaming console, smart TV, and IoT device needs an IP address to connect to the internet. For many years, IPv4 handled this job. However, with billions of internet-connected devices now in use worldwide, the supply of IPv4 addresses has become limited. This led to the development of IPv6, a newer version of the Internet Protocol designed to support the Internet for decades to come.
Many users wonder whether they should switch to IPv6, disable it, or continue using IPv4. The answer depends on your internet provider, router, network, and the websites or services you use. Fortunately, in most cases, you don’t have to choose just one because modern devices support both.
This guide explains what IPv6 is, how it differs from IPv4, and whether you should use IPv6 or IPv4 on your Windows PC, smartphone, or home network.
What is IPv6? Should I Use IPv6 or IPv4?
IPv6, or Internet Protocol Version 6, is the latest version of the protocol responsible for assigning unique addresses to devices connected to the Internet. It was developed to replace IPv4, which has been the foundation of the internet for several decades.
Every device connected to a network requires an IP address. Think of it as a digital home address that allows data to find the correct destination.
Without an IP address, your device wouldn’t know where to send or receive information.
Understanding IPv4
IPv4 uses 32-bit addresses, which provide approximately 4.3 billion unique IP addresses. At the time IPv4 was introduced, this number seemed enormous. However, the rapid growth of the internet, smartphones, cloud computing, and smart home devices quickly exhausted the available address pool.
An IPv4 address looks like this:
192.168.1.100
To overcome the shortage, technologies such as Network Address Translation (NAT) were introduced. NAT allows multiple devices in your home to share a single public IP address assigned by your internet service provider.
Although NAT works well, it also adds complexity to networking and can create challenges for certain applications like online gaming, remote access, and peer-to-peer connections.
Understanding IPv6
IPv6 was designed to solve the address shortage once and for all. Instead of using 32-bit addresses, it uses 128-bit addresses, creating an almost unlimited number of unique addresses.
A typical IPv6 address looks like this:
2001:0db8:85a3:0000:0000:8a2e:0370:7334
Although the address appears much longer than IPv4, most operating systems simplify it automatically, making it easier to read.
The massive address space means virtually every device can have its own unique public IP address without relying heavily on NAT.
Key Differences Between IPv4 and IPv6
The biggest difference is the number of available addresses. IPv4 supports billions of addresses, while IPv6 supports an incredibly larger address space that is sufficient for future generations of internet-connected devices.
Another important difference is efficiency. IPv6 has a simplified packet header, allowing routers to process network traffic more efficiently in many situations.
Security also improves with IPv6. While IPsec can be used with both protocols, IPv6 was designed with stronger support for secure communications.
IPv6 also offers better support for automatic device configuration. Many devices can configure themselves automatically when connected to a compatible network without requiring manual settings.
Should You Use IPv6 or IPv4?
For most home users, the best answer is simple.
Use both whenever possible.
Modern operating systems such as Windows 11, Windows 10, macOS, Android, and iPhone support both IPv4 and IPv6 simultaneously. This is known as Dual Stack networking.
When both protocols are available, your device automatically selects the best connection for each website or online service.
You usually don’t need to manually choose between them.
Reasons to Use IPv6
If your internet provider supports IPv6, keeping it enabled offers several benefits.
One advantage is better scalability. Since there are practically unlimited addresses, every device can have a unique address without exhausting the available pool.
Another benefit is improved network efficiency. IPv6 reduces some of the complexity created by NAT, making certain network communications more direct.
Many newer websites and cloud services are optimized for IPv6, allowing devices to communicate using the latest networking standards.
IPv6 is also designed to make network configuration simpler through automatic address assignment.
As more internet services transition toward IPv6, keeping it enabled helps ensure long-term compatibility.
Reasons to Continue Using IPv4
Despite the advantages of IPv6, IPv4 remains extremely important.
Almost every website and online service still supports IPv4.
Many older routers, printers, business applications, security cameras, and enterprise systems rely primarily on IPv4.
Some internet providers still offer limited or partial IPv6 support, meaning IPv4 continues to handle much of your internet traffic.
If you’re using legacy hardware or specialized software, IPv4 often provides the best compatibility.
Do You Need to Disable IPv6?
Generally, no.
Some users disable IPv6 when troubleshooting network problems because older equipment occasionally experiences compatibility issues. However, disabling IPv6 is rarely necessary on modern networks.
Microsoft also recommends leaving IPv6 enabled because many Windows networking features rely on it.
Unless you’re following specific instructions from your network administrator or technical support, it’s usually best to leave IPv6 turned on.
Can IPv4 and IPv6 Work Together?
Yes.
Most modern networks use Dual Stack, allowing IPv4 and IPv6 to operate simultaneously.
For example, one website may connect using IPv6 while another continues using IPv4. Your computer handles this automatically without requiring any user intervention.
This approach provides the best balance between compatibility and future readiness.
Is IPv6 Faster Than IPv4?
There is no universal answer.
In some situations, IPv6 may offer slightly faster routing because it follows a more direct network path.
In other cases, IPv4 may perform equally well or even slightly better depending on your internet provider, router, geographic location, and the destination server.
For everyday browsing, streaming, video calls, online shopping, and gaming, most users will notice little to no difference in speed.
How Can You Check if IPv6 Is Enabled?
On a Windows computer, open Settings, select Network & Internet, open your active network connection, and view its properties. You can also open Command Prompt and run the ipconfig command. If you see an IPv6 address listed, your computer has IPv6 enabled.
You can also visit an online IPv6 connectivity test website to verify whether your internet connection supports IPv6.
IPV6 Vs IPV4
| Feature | IPv4 | IPv6 |
| Full Name | Internet Protocol Version 4 | Internet Protocol Version 6 |
| Address Length | 32 bit | 128 bit |
| Example Address | 192.168.1.100 | 2001:0db8:85a3:0000:0000:8a2e:0370:7334 |
| Number of Addresses | Around 4.3 billion | Approximately 340 undecillion addresses |
| Address Format | Decimal numbers separated by periods | Hexadecimal numbers separated by colons |
| NAT Requirement | Commonly required due to limited addresses | Usually not required because of the vast address space |
| Auto Configuration | Limited support | Built-in automatic address configuration |
| Security Support | Supports IPsec, but it is optional | Designed with better support for IPsec and secure networking |
| Network Efficiency | Good, but relies heavily on NAT | More efficient routing with a simplified packet header |
| Compatibility | Supported by virtually all devices and websites | Supported by most modern devices, networks, and websites |
| Current Usage | Still widely used across the internet | Rapidly growing alongside IPv4 |
| Best Choice | Excellent for compatibility with older hardware and software | Best for future-ready networks and modern internet connectivity |
Quick Take: For most users, the ideal setup is to keep both IPv4 and IPv6 enabled. Modern operating systems automatically choose the best protocol for each connection, giving you the benefits of IPv6 while maintaining full compatibility with IPv4 services.
FAQs
What does IPv6 stand for?
IPv6 stands for Internet Protocol Version 6. It is the latest version of the Internet Protocol used to identify devices and route data across the Internet.
Is IPv6 replacing IPv4 completely?
Not yet. Most internet networks currently use both protocols together. IPv4 continues to be widely supported, while IPv6 adoption continues to grow worldwide.
Should I enable IPv6 on Windows?
Yes. If your router and internet service provider support IPv6, keeping it enabled is generally recommended. Windows is designed to work efficiently with both IPv4 and IPv6.
Will IPv6 make my internet faster?
Not necessarily. While IPv6 may provide slightly better routing in some situations, overall internet speed depends more on your internet plan, network quality, and server performance than on the IP protocol being used.
Can older devices use IPv6?
Some older devices and legacy networking equipment do not support IPv6. In those cases, they continue using IPv4 without affecting newer devices that support both protocols.
Is IPv6 more secure than IPv4?
IPv6 includes improved support for modern security features and secure communications. However, overall network security also depends on proper router configuration, firewalls, software updates, and safe browsing practices.