[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.