Why IPv4 Has Lasted This Long And Why It Is Not Sustainable

[Monica Auzia]

IPv4 has lasted long due to NAT, efficient address usage techniques, and its extensive existing infrastructure. However, it is not sustainable because its address space is limited and exhausted, adding complexity with NAT, and it cannot efficiently support the growing number of devices. IPv6 addresses these issues with a larger address space and improved features.

[Adebola Oguntayo]

IPv6 also eliminates the need for NAT, making network configuration and management easier.

[Lamin Beyai]

IPv4 has persisted for decades due to workarounds like NAT and CIDR and its deep integration into the global Internet infrastructure. However, its limited address space, lack of inherent security features, and inability to scale with the rapid growth of Internet-connected devices make it unsustainable in the long term. IPv6, with its enhanced security features and vastly larger address space, is the future-proof solution for the Internet.

[Godlisten Sumari]

IPv4 last long due to introduction of NAT(Network Address Translation), use of classless inter-domain routing(CIDR) and subnetting

[Matthias Kizito Mukalazi]

NAT and private Ip addressing

[Samuel Mwamsaku]

IPv4 has lasted this long because NAT was introduced to extend the lifetime of IPv4 by allowing multiple devices on a private network to share a single public IP address. This helped conserve public IPv4 addresses, delaying the exhaustion of the IPv4 address pool. However, it is not sustainable because of its limited address space, 32 bit addresses, providing up to only 4.3 billion unique addresses

[Emmanuel Micah]

Exactly.

But then with the increasing number of users, it will be exhausted if an an alternative like IPV6 is not introduced.

[Orapeleng Mangena]

Perfecto!

[Taye Oyebola]

IPv4 has lasted long because of technologies that optimized its usage like CIDR and NAT. It’s not sustainable because of depletion of IPv4 address space.

[Modester Phiri]

IPv4’s longevity was extended through technical workarounds but its limitations make it unsustainable for the growing Internet.

[Robert Mwanzia]

Ok

[Patricia Wairimu]

IPV4 has lasted a long time due to the existence of CIDR, VLSM and Network Address Translation but due to the demand of address space and the limitations of NAT for example degraded performance, increased operation expenditure and Breaking IPSEC, IPV6 has evolved to address this limitations.

[Robert Mwanzia]

Okay

[Adewunmi Ayodeji]

IPv4 has lasted so long because it’s simple and has worked well with technologies like NAT and CIDR to stretch its limited number of IP addresses. However, with billions of devices now online, IPv4’s pool of addresses is running out. Even with fixes like NAT, it’s becoming harder to keep up. That’s why IPv6, with its much larger address space, is the future—making sure we have enough room for all the new devices connecting to the internet.

[Sebit Lado]

the ipv4 is last so long because of approaches, the private ip addresses where a range of ip addresses used in a local network, and the second approach is NAT, network Address translation where a one public ip address can represent a thousands of ip addresses in the network instead of assigned each network a single public ip addresses.

secondly the ipv4 is not sustainable because of

1- Exhaustion of IP Addresses: where the 32 bit for 4.3 billions is not enough due to the increased number of internet users and the connection of the machines to the network.

2- NAT has some drawbacks like security and end to end connectivity, because with NAT it is hard to track anyone in the Network.

3- lack of scalability: with the growth of the internet, especially with the rise of IoT devices which require millions or billions of IP addresses, which means that IPv4 cannot support the scale needed for the future of the internet.

[Philip Larbi Kweku]

Remaining ipv4 address is about 3.7 billion if all these ips are assigned to users who are online then what will be left to be assign whn new joiners come.

ipv6 ran on 128 bit. i belive the foundation of ipv6 is very much needed in the network translation

[Philip Larbi Kweku]

Hello Team.please the portal is very slow .is someone expericing similar issue

[Humbelani Stephen Nndwa]

I was also experiencing the same issue, however now the response is much faster than before

[Priscilla Thandolwethu Mwala]

Yes. I can’t comment unless it’s under someone’s comment. Help

[Philip Larbi Kweku]

ipv4 header has more layers than ipv6 14 and 8 respectively.what will be the parameter in checking the header on both ips ?

[Timothy Ugaseh]

IPv4 has lasted as long as it has due to workarounds like NAT, efficient routing techniques, and massive early adoption. However, it is not a sustainable solution for the future. The exponential growth of the internet, the surge in connected devices (IoT), and the depletion of the address space make IPv6 a necessity. IPv6, with its much larger address space, better security features, and simplified routing, is designed to replace IPv4.

[Kumbukani Mwambembe]

IPv4 has remained in use longer than expected due to Network Address Translation (NAT), which conserves IP addresses by allowing multiple devices on a private network to share a single public IP. However, IPv4 is unsustainable due to key limitations, primarily address exhaustion from its 32-bit address space, which supports only 4.3 billion unique IP addresses. Workarounds like NAT add complexity and reduce efficiency. Additionally, IPv4 struggles to scale as the number of internet-connected devices grows. IPv6, with its 128-bit address space, resolves these issues by providing vastly more addresses, better scalability, and improved security.

[Darmi Jillo]

IPv4 has lasted this long due to its widespread early adoption and the implementation of techniques like NAT (Network Address Translation), CIDR (Classless Inter-Domain Routing) & VLSM to extend its usability. However, it’s not sustainable because its 32-bit address space provides only about 4.3 billion unique addresses, and with growing number of devices connecting to the internet it’s not sustainable.

[Shanon Mwanga]

There’s extended longevity due to established Infrastructure for IPv4 as well as improved allocation techniques and adoption of IPv6

It Is Not Sustainable due to Address Exhaustion, Scalability Issues and. Security Limitations

[Benjamin Akinmoyeje]

IPv4 has lasted this long because of various mechanisms such as RFC 1918 and network address translation (NAT) implemented by networrk administrators to manage the limited IPv4 resources. Practically they also use CIDR, VLSM and private addresses.

[Aboubakar MOUMINI]

Déploiement progressif : IPv4 a été déployé progressivement, ce qui a permis aux réseaux et aux équipements de se mettre à jour graduellement.