220-801 · Question #235
Which of the following is a clear characteristic of an IPv6 Internet address?
The correct answer is C. 128 bit length. IPv6 addresses are 128 bits long, expressed as eight groups of four hexadecimal digits separated by colons, which vastly expands the available address space compared to IPv4.
Question
Which of the following is a clear characteristic of an IPv6 Internet address?
Options
- A32 bit length
- BAPIPA compatibility
- C128 bit length
- D64 bit length
How the community answered
(37 responses)- A3% (1)
- B3% (1)
- C89% (33)
- D5% (2)
Why each option
IPv6 addresses are 128 bits long, expressed as eight groups of four hexadecimal digits separated by colons, which vastly expands the available address space compared to IPv4.
32-bit addresses are the defining characteristic of IPv4, not IPv6.
APIPA (Automatic Private IP Addressing, range 169.254.0.0/16) is an IPv4 feature and has no equivalent or compatibility in IPv6, which uses link-local addresses in the fe80::/10 range instead.
IPv6 was designed with a 128-bit address space to overcome IPv4 address exhaustion. This provides approximately 3.4x10^38 unique addresses. The 128-bit length is a fundamental and defining characteristic of the IPv6 protocol as specified in RFC 8200.
64 bits is not the full IPv6 address length; the interface identifier portion of many IPv6 addresses is 64 bits, but the total address is 128 bits.
Concept tested: IPv6 address bit length and structure
Source: https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/ipv6-overview
Topics
Community Discussion
No community discussion yet for this question.