Internet Protocol version 5 (IPv5) is a relatively unknown iteration of the Internet Protocol, which was designed to include features that would enable efficient transmission of real-time data such as voice and video over the internet. Developed in the 1990s, IPv5 was set to be the successor of IPv4, which is the most widely used version of the protocol today. However, IPv5 never really took off, and instead, IPv6 was adopted as the successor to IPv4.

So, what happened to IPv5? Let’s take a closer look.

The Origins of IPv5

IPv5 was initially designed to provide support to Internet Stream Protocol (ST). Internet Stream Protocol would enable high-priority data, such as real-time video and voice transmission, to be sent across the internet with guaranteed quality-of-service. This would be particularly beneficial for applications like online gaming and video conferencing.

IPv5 included a number of features that were designed to improve the transmission of this type of data. One of the features included in IPv5 was an extension to the protocol header, which would carry information about the data level that needed to be catered for. This is what made it different from IPv4, which could not support real-time data or quality-of-service guarantees.

The Demise of IPv5

Despite being designed to cater for the transmission of high-priority data, IPv5 never saw widespread adoption. In fact, its implementation never got off the ground. The reason for this is primarily due to two factors: lack of support and the emergence of IPv6.

Lack of Support

The main reason why IPv5 never took off is due to the lack of support for the protocol. Unlike IPv4 and IPv6, there was no significant backing from industry organizations like the Internet Engineering Task Force or the Internet Society. In fact, the protocol was never fully documented or standardized. It was only ever a proposal, and because it was not fully supported, it was never implemented in any significant way.

Emergence of IPv6

The arrival of IPv6 was another significant factor in the demise of IPv5. IPv6 is the successor to IPv4, which has been the most widely used iteration of the protocol. IPv6 was designed to cater for many of the shortcomings of IPv4, including an explosion in the number of devices connected to the internet. IPv6 brought with it several valuable features, including increased address space, support for Quality of Service (QoS) and improved security.

With such significant improvements, IPv6 quickly became the protocol of choice for internet infrastructure. The adoption of IPv6 also meant that there was less need for IPv5, especially as its support was so limited.

Conclusion

In summary, IPv5 was designed as a protocol that would cater for the transmission of high-priority data over the internet. Despite offering features that were not present in IPv4, it never took off because it lacked support and was never fully documented or standardized. The emergence of IPv6, with its extensive improvements, rendered it obsolete. Today, IPv6 is the preferred protocol for most internet infrastructure, and IPv5 is all but forgotten.