Revision history [back]

Cheat sheets and YouTube videos are definitely helpful, but I would recommend trying to reference more authoritative sources first. Mind you, Jeff Carrell is definitely a reputable source, but it's still good to know where he gets his information from, which is here:

• RFC 4291 IP Version 6 Addressing Architecture:
  • Section 2.2. Text Representation of Addresses is the definitive source for IPv6 address text representations, and
  • Section 2.5.3. The Loopback Address is where the Loopback Address is defined.
• RFC 5952 A Recommendation for IPv6 Address Text Representation:
  • Section 4. A Recommendation for IPv6 Text Representation is where the "::" notation is introduced and the rules surrounding its use are governed.
• RFC 6890 Special-Purpose IP Address Registries:
  • Section 2.2.3. IPv6 Special-Purpose Address Registry Entries also explicitly lists the short form loopback address definition as ::1/128.