IPv4 uses 32-bit addresses, allowing for about 4.3 billion unique addresses.
While IPv6 uses 1238-bit addresses, providing a vastly larger address space of approximately 340 undecillion addresses.
akriti Answered question September 19, 2024
The most obvious difference is that IPv4 uses a 32-bit address while IPv6 uses a 128-bit address. This means that IPv6 offers 1,028 times more addresses than IPv4, which essentially solves the “running out of addresses” problem (at least for the foreseeable future).
Anonymous Answered question September 19, 2024