May 31, 2023

When Will IPv6 Replace IPv4 & Which is Better?

In today’s modern age of technology, the use of the internet has become a necessity for almost every person on the planet. The internet has revolutionised the way we communicate, work, study, and entertain ourselves. One of the underlying technologies that make the Internet possible is the Internet Protocol or IP. There are currently two versions of IP in use – IPv4 and the later version, IPv6. However, a critical question is being raised now which is “ When will IPv6 replace IPv4? “.

Why was IPv6 used to replace IPv4? 

IPv4 was first introduced in the 1980s and was the primary protocol used for communication over the internet until now. After decades of use, IPv4’s address space became a major issue as more and more Internet-connected devices were added to the network. IPv4 had a limited address space of only 32 bits, which translated to a theoretical maximum of 4.3 billion unique IP addresses. However, due to the explosive growth of connected devices, it became increasingly clear that this address space was insufficient.

To address this issue, IPv6 was developed which was perhaps one of the most significant technological advancements in the world of networking. This protocol was developed as a replacement for the Internet Protocol version 4 (IPv4) with a significantly larger address space of 128 bits, which translates to approximately 340 undecillion unique IP addresses, effectively providing an almost unlimited supply of addresses to meet the growing needs of the internet.

Why do we still use IPv4?

Despite the limitations associated with IPv4, it is still being widely used due to several reasons.

Compatibility and Support 

One reason for the continued use of IPv4 is that many older systems and devices do not support IPv6. This means that such systems and devices would need to be upgraded to support IPv6, leading to significant costs for organisations. Additionally, the transition to IPv6 requires a significant investment and infrastructure upgrade, such as upgrading routers and firewalls, which many organisations are unwilling or unable to undertake.

Ease of Configuration 

IPv4 is also more straightforward to configure than IPv6, and most IT administrators are already familiar with its implementation. It is known to work well with existing internet technologies, which makes it the preferred choice for businesses that do not want to undergo significant changes and face the potential risks of deploying new technology. 

Adoption 

Lastly, the adoption of IPv6 is highly dependent on widespread adoption by internet service providers (ISPs). This is mainly because ISPs play a critical role in the distribution of IP addresses and need to upgrade their systems to support IPv6. However, many ISPs are yet to adopt IPv6, resulting in slow adoption overall.

What are the benefits of using IPv6 over IPv4?

Larger Address Space

One of the primary advantages of IPv6 over IPv4 is the larger address space. IPv6 employs a 128-bit address space, which can accommodate a significantly higher number of unique IP addresses than IPv4. This large address space means that IPv6 does not require address conservation techniques such as Network Address Translation (NAT) that are used in IPv4. With IPv6, every connected device can have a unique IP address, simplifying network management and improving the performance of internet-enabled devices.

IPv6 is essential for the development of emerging technologies such as the Internet of Things (IoT) and 5G networks. IoT devices require unique IP addresses, and IPv6 can provide enough addresses to allow every device in the IoT ecosystem to connect to the Internet. 5G networks also require an ample amount of addresses to support millions of devices, and IPv6 can conveniently provide that.

Enhanced Security 

Another significant benefit of IPv6 is its enhanced security features. IPv6 includes a built-in security protocol called Internet Protocol Security (IPsec), which provides a more secure communication environment. IPsec offers end-to-end encryption, ensuring that data transmitted over the internet remains secure and protected from unauthorized access. The secure communication environment of IPv6 fosters better privacy protection and enables the development of new security features.

Efficient Network Routing Capabilities 

IPv6 also provides efficient network routing capabilities. Routing is the process of directing network traffic between networks or subnets, and IPv6 uses a hierarchical addressing structure that simplifies routing. This hierarchical model enables efficient and simplified network routing, which reduces the load on individual network routers and makes traffic flow more stable and faster than IPv4.

Improved QoS

In addition, IPv6 offers improved Quality of Service (QoS) compared to IPv4. QoS is a set of technologies that enables network service providers to prioritise traffic based on specific requirements of network applications. With IPv6, QoS is integrated into the protocol, rather than implemented through additional mechanisms as seen in IPv4. This integration results in more efficient traffic prioritisation, leading to improved overall network performance.

In conclusion, IPv6 will eventually replace IPv4 completely, but the transition may take a considerable amount of time. The adoption of IPv6 will be driven by the exhaustion of available IPv4 addresses and the need for enhanced features such as improved security and efficient routing.