Why IPv6 is a 128-bit address?

Question

Basically, the 128-bit address space of IPv6 gives us such a massive address space that we are unlikely to ever use all of it (2^128 addresses, or 3.4*10^38). The larger address space also allows for a better hierarchical model of addressing, because CIDR and similar "hacks" are no longer necessary for routing. 18 окт. 2010 г.

What does :: 1 128 represent in IPv6 addressing?

::1/128 — The loopback address is a unicast localhost address (corresponding to 127.0. 0.1/8 in IPv4). If an application in a host sends packets to this address, the IPv6 stack will loop these packets back on the same virtual interface.

How long is an IPv6 address 128?

Explanation: An IPv6 address is 128 bits long. 2.

Why is IPv6 64 bit?

In IPv6, the address space is deemed large enough for the foreseeable future, and a local area subnet always uses 64 bits for the host portion of the address, designated as the interface identifier, while the most-significant 64 bits are used as the routing prefix.

Which IP address is 128 bits long?

In precise terms, an IPv6 address is 128 bits long and is arranged in eight groups, each of which is 16 bits. Each group is expressed as four hexadecimal digits and the groups are separated by colons. An IPv6 address is split into two parts: a network and a node component.

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