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Is 128 a valid IPv6 address?

Contents
  1. What are valid IPv6 addresses?
  2. How long is an IPv6 address 128?
  3. Why does IPv6 have 128 bits?
  4. What does :: 1 128 represent in IPv6 addressing?
IPv6 uses 128-bit (2128) addresses, allowing 3.4 x 1038 unique IP addresses. This is equal to 340 trillion trillion trillion IP addresses. IPv6 is written in hexadecimal notation, separated into 8 groups of 16 bits by the colons, thus (8 x 16 = 128) bits in total. 24 сент. 2019 г.


What are valid IPv6 addresses?

An IPv6 (Normal) address has the following format: y : y : y : y : y : y : y : y where y is called a segment and can be any hexadecimal value between 0 and FFFF. The segments are separated by colons - not periods.

How long is an IPv6 address 128?

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

Why does IPv6 have 128 bits?

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.

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.

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