Free Practice Questions for Infoblox NIOS-DDI-Expert Exam

Comprehensive and Detailed In-Depth Explanation:Audit log redirection in NIOS:

Setup:In Grid Manager (Administration > Logs > Syslog), enable “Redirect audit log to syslog.” Audit events (e.g., config changes) merge into syslog.

Behavior:If remote syslog servers are defined (Grid > Grid Properties > Syslog Servers), all syslog data—including audit logs—is sent there.

Why True:Redirection ensures audit logs reach all configured remote servers alongside local syslog.

Practical Example:In an INE lab, redirect audit logs, change a DNS record, verify syslog on a remote server, and troubleshoot logging.References:Infoblox NIOS Administrator Guide – Logging Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.

Comprehensive and Detailed In-Depth Explanation:In an HA pair, the passive node stays synchronized with the active node to ensure seamless failover. This synchronization usesbloxSync, a proprietary Infoblox protocol that securely transfers database updates (e.g., DNS records, DHCP leases) between the HA pair members over an SSL-encrypted connection. Theactive node, being the operational member, directly provides these updates to the passive node. The Grid Master handles Grid-wide sync, but within an HA pair, the active node is the source. Options A and B misrepresent the mechanism (it’s not a traditional VPN), and Option D incorrectly attributes the sync to the Grid Master. This is a critical HA troubleshooting topic in the INE course.References:Infoblox NIOS Documentation – HA Pair Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.

Comprehensive and Detailed In-Depth Explanation:Extensible Attributes (EAs) enhance NIOS object metadata, and the "Default Value" option sets a predefined value automatically applied when the EA is assigned to an object (unless overridden).

Purpose:It simplifies configuration by pre-populating common values, reducing manual entry.

Scenario:For an EA like "Department," setting a default value of "IT" ensures new networks inherit this unless specified otherwise (e.g., "HR").

Options:

A:Allowable ranges (e.g., 1-100) are set via EA type (Integer) and constraints, not default values. Incorrect.

B:Numeric values with ranges relate to validation, not defaults. Incorrect.

C:Assigning a predefined value (e.g., "Enabled" for "Status") is the exact use case for defaults. Correct.

D:Unique values per object contradict defaults, which apply uniformly unless changed. Incorrect.

Practical Example:In an INE Grid deployment lab, you’d set a default EA "Region: US" for new members, streamlining setup and troubleshooting consistency.References:Infoblox NIOS Administrator Guide – Extensible Attributes; INE Course Objective: NIOS DDI Grid Deployment.

Comprehensive and Detailed In-Depth Explanation:Clearing the NIOS database requires a precise CLI command:

B (reset database):Wipes DNS zones, DHCP leases, and Grid membership, but retains:

System logs (e.g., syslog, infoblox.log).

Licenses (e.g., reporting, DNSSEC).

Network settings (IP, hostname). Correct.

A:“reset all” isn’t valid (see Q28). Incorrect.

C:“reset config” isn’t a command—closest is set factory, which wipes everything. Incorrect.

D:reset all licenses clears licenses only, not the database. Incorrect.

Practical Example:In an INE lab, you’d run reset database, verify logs persist via show log, and reconfigure, testing Grid recovery.References:Infoblox NIOS CLI Reference Guide – Reset Commands; INE Course Content: NIOS DDI Grid Troubleshooting.