A network administrator is transitioning a company's internal services to an IPv6 infrastructure and verifying host configuration parameters and DNS record deployments. Which of the following statements regarding IPv6 addressing syntax rules and deployment mechanisms are correct? (Select TWO.)
- DNS forward lookup zones must utilize AAAA records to map hostnames to 128-bit IPv6 addresses.Cevap
- Leading zeros within a 16-bit hex field may be suppressed, but a double colon () can only appear once in an address string.Cevap
- CAn IPv6 address can be compressed using multiple double colons, such as , to represent non-contiguous zero fields.
- DStandard A records are used for IPv6 address resolution by appending a 128-bit subnet prefix to the host IP.
Cevap
DNS forward lookup zones must use AAAA records to resolve hostnames to 128-bit IPv6 addresses, and RFC 5952 compression rules permit leading zero suppression while restricting double-colon () usage to at most once per address.
The statements confirming that AAAA records are used for IPv6 hostname resolution and that a double colon () may only be used once per IPv6 address string are accurate. AAAA records accommodate 128-bit addresses, and restricting to a single occurrence ensures that zero-compression remains completely deterministic during address expansion.
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IPv6 Address Syntax Compression & DNS Deployment