Comprehensive and Detailed In-Depth Explanation:In NIOS Grid Manager (Data Management > DNS > Add Zone), administrators can create various zone types to manage DNS resolution. All listed options are valid:
* A (Authoritative Zone):A zone where the Infoblox appliance is the authoritative source for DNS records (e.g., example.com with A, MX records). Correct.
* B (Forward Zone):A zone configured to forward queries to external DNS servers (e.g., forwarding
"internal.com" to a corporate DNS). Correct.
* C (Primary Zone):Often synonymous with Authoritative Zone in Infoblox, it's a master zone hosting original DNS data (distinct from secondary zones). Correct.
* D (Delegation):A zone delegated to another name server (e.g., "sub.example.com" delegated to different NS records). Correct.
* Clarification:In NIOS, "Authoritative" and "Primary" are sometimes used interchangeably, but both are options in the Add Zone wizard, alongside Forward and Delegation zones.
* Practical Example:In an INE lab, you might add an Authoritative Zone for "lab.com," a Forward Zone for external lookups, and a Delegation for a subdomain, testing DNS troubleshooting across these types.
References:Infoblox NIOS Administrator Guide - DNS Zone Management; INE Course Content:
NIOS DDI DNS Troubleshooting.