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

[Ashik poudel]

It’s the NAT and CIDR playing important role for lasting this long but since the IOT devices and reachability to internet is expanding limited ipv4 cannot fulfil the needed requirement ,IPv6 must be deployed since it’s 128 bits .

[George Mtawali]

IPv4 survived because of clever workarounds (NAT, CIDR, VLSM, private IPs). But it’s not sustainable because there simply aren’t enough addresses for the future.

[LEYAMYAM DAVID]

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[Mpho Thendo Madongo]

IPv4 has lasted much longer because of the use of NAT and also Private IP Address

[Subur Steven]

This is due to the introduction of NAT which allows many devices in a private network to share one public IP address.

[Henry Selasi Sosu]

Private IP ranges can be reused in different networks, reducing the need for public IPs.

[Subur Steven]

IPv4 has lasted for decades because technologies such as NAT, private addressing, and Classless Inter-Domain Routing allowed more efficient use of its limited address space. These techniques enabled many devices to share a single public IP address, slowing address exhaustion. However, IPv4 uses a 32-bit address system that supports only about 4.3 billion addresses, which is insufficient for the rapidly growing number of internet-connected devices. Therefore, it is not sustainable in the long-term, leading to the adoption of IPv6 with a much larger address space.

• This reply was modified 1 month, 3 weeks ago by  Subur Steven.

[Motlamedi Patrick Mohubu]

The shortage of ipv4 addresses limits further development of mobile IP and broadband technologies that require an increasing number of IP addresses. A large number of routing entries on devices need to be maintained.😇

[Kwaku Oppong-Boateng]

IPV4 is not sustainable of the ever increasing devices ,iots, and gadgets that will need access to the internet each needing a unique IP address.

the use of Private Addresses, vlsm and cidr has made it possible to manage the needfor IP addresses

[Emmanuel Ngetich]

IPv4 has lasted due to Network Address Translation (NAT) that allows multiple devices to share a single public IP, widely used in homes and enterprises, Dynamic Host Configuration Protocol (DHCP) recycles IP addresses by assigning them temporarily, Classless Inter-Domain Routing (CIDR) has improved efficiency in address allocation by breaking networks into smaller subnets and IPv4 markets organizations trade unused IPv4 addresses, delaying total exhaustion. It is not suitable because of its exhaustion and with the current technology more IP addresses are required hence IPv4 would be exhausted very soon, global policy shift is being effected by some countries requiring IPv6 be used.

[Dennis Kipruto]

hello

[wahab Sodiq]

IPV4 has lasted soo long because of the use of private IP address. Nat and CIDR implementation

[Peter Korley Sogbodjor]

IPv6 ellimintes the need for NAT

[Francis Oroma]

I understand that CIDR uses prefix lengths like /22, but how exactly does that prevent the waste we saw in Class B addressing?

[Eddy Ravelotahina]

In classfull concept, class B is /16, we can not have /22 or the router change it automatically to /16. So if /22 (1022 usable hosts) is enough for your subnet in CIDR, 65 534 – 1022 = 64 512 will be wasted in classfull /16 subnet.

[Tshepo Tsotetsi]

Very informative course by far as IPv6 is very complex and one needs to get get the basics right

[Ekeabasi Udoh]

The longevity of IPv4 has lasted this long because the original architecture had fewer internet addresses.

[Eddy Ravelotahina]

So, if I understand correctly, we can’t establish an IPsec tunnel if one of the peer is NATed?

[Mphatso Moses Kukhola Chiwanda]

IPv4 has lasted this long mainly due to workarounds like NAT, CIDR, and subnetting.

[Emmanuel Dabbie Botchway]

IPv4 has lasted so long because of its massive global deployments and workarounds like NAT, CIDR, and Private addressing that delayed address exhaustion. However it only supports about 4.3 billion addresses, which is insufficient for growing IoT ecosystem. Techniques likes NAT also break end-to-end connectivity and increase network complexity. IPv4 lacks built-in modern security features and creates insufficiencies due to address scarcity.

[Basulian Ndegwa]

IPv4 has lasted this long due to <strong data-start=”1909″ data-end=”1969″>innovations like NAT, CIDR, VLSM, and private addressing, which stretched its limited capacity.

However, it is <strong data-start=”2027″ data-end=”2046″>not sustainable because the <strong data-start=”2059″ data-end=”2089″>address space is exhausted, the number of connected devices keeps growing, and the workarounds introduce complexity and limitations.