Spaceforce

1 / 27

Other keys: show • Space: good • 1-4: rate • 0: skip • 5: flag • 6: invert

Question

What are the three major issues with IPv4 that drove the development of IPv6?

Answer

Address exhaustion (only ~4.3 billion IPv4 addresses), the explosion of Internet-connected devices (IoT), and NAT breaking true end-to-end connectivity.

Three Major IPv4 Issues:

Issue	Description
IPv4 Address Exhaustion	Only ~4.3 billion addresses total; IANA exhausted pool in 2011
Internet of Things (IoT)	Billions of new devices need IP addresses
Lack of end-to-end connectivity	NAT breaks true end-to-end communication

IPv4 Exhaustion Timeline:

IANA pool exhausted: February 2011
APNIC (Asia-Pacific): April 2011
RIPE NCC (Europe): September 2012
LACNIC (Latin America): June 2014
ARIN (North America): September 2015

Context: IPv6 provides 340 undecillion addresses (3.4 × 10^38) compared to IPv4's 4.3 billion - enough for every grain of sand on Earth to have billions of addresses.

Go deeper:

IPv4 address exhaustion (Wikipedia) — the depletion story with the exact IANA (2011) and per-RIR exhaustion dates.
IPv6 (Wikipedia) — why the IETF designed a 128-bit successor and what else it fixes beyond address space.

or press any other key