Pass the Infoblox DDI Professional NIOS-DDI-Expert Questions and answers with CertsForce

Comprehensive and Detailed In-Depth Explanation:NIOS Grid Backup allows scheduled exports of the configuration database (DNS, DHCP, Grid settings) to an external server. Supported protocols ensure flexibility and security:

A (SFTP):Secure File Transfer Protocol (SSH-based) is supported for encrypted backups to remote servers (port 22). Widely used for secure transfers. Correct.

B (SCP):Secure Copy Protocol (also SSH-based) is supported, offering a simple, secure file transfer option (port 22). Correct.

C (FTP):File Transfer Protocol (unencrypted, port 21) is supported for legacy systems, though less secure. Correct.

D (HTTPS):Web-based secure transfer (port 443) is supported, allowing backups to HTTP servers with SSL/TLS encryption. Correct.

Setup:In Grid Manager (Grid > Grid Manager > Backup), you configure the protocol, server IP, and credentials.

Practical Example:In an INE lab, you’d schedule a backup using SFTP to a remote server, test restoration, and troubleshoot connectivity issues, reinforcing Grid deployment skills.

Note:All four are explicitly supported per NIOS documentation, making this a comprehensive list.References:Infoblox NIOS Administrator Guide – Grid Backup; INE Course Objective: NIOS DDI Grid Deployment.

Comprehensive and Detailed In-Depth Explanation:Restarting services post-change (e.g., DNS zone update) requires minimizing downtime:

B:“Restart if needed” checks if a restart is required per member, and “sequentially” staggers restarts (e.g., passive HA nodes first), ensuring continuous service. Least disruptive. Correct.

A:Simultaneous force restart stops all services at once—maximum disruption. Incorrect.

C:GM-only restart ignores other members needing updates, incomplete. Incorrect.

D:HA members only misses single nodes or GM, partial solution. Incorrect.

Practical Example:In an INE lab, you’d select sequential restart after a DHCP range change, monitor client connectivity, and troubleshoot minimal impact.References:Infoblox NIOS Administrator Guide – Service Restarts; INE Course Content: NIOS DDI Grid Troubleshooting.

Comprehensive and Detailed In-Depth Explanation:DHCP Failover peers sync leases via TCP 647. A firewall blocking this shifts the state to COMMUNICATIONS-INTERRUPTED:

State Impact:

Both peers serve existing clients and limited new leases (via MCLT).

No sync occurs, risking lease conflicts if prolonged.

Best Action:Manually set one peer toPARTNER-DOWN(Grid > DHCP > Failover > Edit), giving the other full pool control to avoid conflicts.

Why Secondary:Conventionally, the secondary is set to PARTNER-DOWN, letting the primary take over as the authoritative peer (per Infoblox best practices).

Options:

A:Doing nothing risks conflicts if new leases exceed MCLT capacity. Incorrect long-term.

B:Primary to PARTNER-DOWN cedes control to secondary, less standard. Incorrect.

C:Secondary to PARTNER-DOWN empowers primary, aligning with failover design. Correct.

D:Changing split value doesn’t address sync loss. Incorrect.

Practical Example:In an INE lab, you’d simulate this, set secondary to PARTNER-DOWN, and troubleshoot lease consistency post-firewall fix.References:Infoblox NIOS Administrator Guide – DHCP Failover States; INE Course Content: NIOS DDI DHCP Troubleshooting.

Comprehensive and Detailed In-Depth Explanation:Generating a support bundle for diagnostics:

B:CLI command set support bundle (space, not underscore) generates and downloads a bundle (.tar.gz) with logs, configs, etc. Correct with typo adjustment.

A:Backup is separate (Grid > Backup)—no bundle extraction. Incorrect.

C:GUI offers download (Grid > Grid Manager > Toolbar > Download Support Bundle), but question specifies action—CLI fits phone context. Partially correct but not best.

D:Support assists but doesn’t generate—user action required. Incorrect.

Practical Example:In an INE lab, run set support bundle, transfer it via SCP, and troubleshoot with support.References:Infoblox NIOS CLI Reference Guide – Support Bundle; INE Course Content: NIOS DDI Grid Troubleshooting.