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Infoblox Qualified NIOS DDI Expert - INE Sample Questions (Q52-Q57):

NEW QUESTION # 52
What sends the email messages for Workflow Approval notifications in NIOS?

A. NIOS Grid Master (GM) and the NIOS Grid Master Candidate (GMC)
B. NIOS Grid Master (GM)
C. NIOS SuperAdmin
D. NIOS Grid Master Candidate (GMC)

Answer: B

Explanation:
Comprehensive and Detailed In-Depth Explanation:Workflow Approval notifications:
* A:The Grid Master (GM) sends emails via its configured SMTP settings (Grid > Grid Properties > Email), as it manages Grid-wide tasks. Correct.
* B:GMC is a standby, not active unless promoted-doesn't send emails. Incorrect.
* C:Only GM sends, not both-GMC is passive. Incorrect.
* D:SuperAdmin is a role, not a process-no sending capability. Incorrect.
* Practical Example:In an INE lab, configure SMTP on the GM, test approval emails, and troubleshoot delivery from GM logs.References:Infoblox NIOS Administrator Guide - Workflow Notifications; INE Course Objective: NIOS DDI Grid Deployment.

NEW QUESTION # 53
You accidentally deleted several DNS entries from the Grid. How can you recover from this mistake with the least service disruption?

A. Restore the database from the last backup
B. Force HA failover on the GM, if it is an HA pair
C. Promote a GMC to be the new GM
D. Restore the records from the recycle bin

Answer: D

Explanation:
Comprehensive and Detailed In-Depth Explanation:Accidentally deleting DNS entries (e.g., A records) in NIOS requires a recovery method that minimizes downtime and complexity. Here's the analysis:
* Recycle Bin Feature:NIOS includes a Recycle Bin (Data Management > DNS > Recycle Bin) that temporarily stores deleted objects (e.g., zones, records) unless permanently purged or the bin is disabled. Restoring from here is instantaneous and doesn't interrupt services.
* Options:
* A:Restoring from a backup (Grid > Grid Manager > Backup > Restore) replaces the entire database, requiring service restarts and potentially losing post-backup changes. High disruption.
Incorrect.
* B:Promoting a Grid Master Candidate (GMC) to Grid Master (GM) shifts control but doesn't recover deleted records-it's for GM failure, not data loss. Irrelevant. Incorrect.
* C:Forcing HA failover on the GM switches active/passive nodes but doesn't restore data, as both share the same database. No effect. Incorrect.
* D:Restoring from the Recycle Bin (select records > Restore) reverts the deletion with no service impact, assuming the bin is enabled (default in NIOS). Correct.
* Practical Example:In an INE lab, you'd delete an A record, navigate to the Recycle Bin, restore it, and verify DNS resolution-all without downtime, testing troubleshooting skills.
* Caveat:If the Recycle Bin is disabled or entries are purged, backup restoration (A) becomes necessary, but the question implies least disruption, favoring D.References:Infoblox NIOS Administrator Guide - Recycle Bin; INE Course Content: NIOS DDI DNS Troubleshooting.

NEW QUESTION # 54
You have DHCPv4 failover, and one of the peers lost power, triggering the COMMUNICATIONS- INTERRUPTED state. Power will be restored in 1 hour. In the meantime, there are several new devices coming online. What must you do to ensure DHCP service runs smoothly for everyone?

A. Contact Infoblox Support and be ready to place the remaining peer or member into PARTNER-DOWN
B. Change DHCP relay or router configuration to only relay to the remaining peer or member
C. Nothing. All existing clients can renew with the remaining peer. The remaining peer can likely service a few new clients even with the reduced new client capacity
D. Immediately increase lease time on affected networks to 4 hours or more

Answer: C

Explanation:
Comprehensive and Detailed In-Depth Explanation:DHCP Failover in NIOS ensures redundancy between two peers (primary and secondary). When one peer loses power, the state shifts toCOMMUNICATIONS- INTERRUPTED, meaning the remaining peer continues serving DHCP but with limited capacity for new leases. Let's analyze:
* Failover Mechanics:In NORMAL state, peers split the lease pool (e.g., 50/50 or custom split). In COMMUNICATIONS-INTERRUPTED, the surviving peer:
* Renews leases for existing clients (using its synced database).
* Assigns new leases from its portion of the pool, with reduced capacity (e.g., MCLT-Maximum Client Lead Time-limits new lease duration).
* Scenario:Power is out for 1 hour, and new devices are joining. The remaining peer can handle renewals and has some new lease capacity (depending on pool size and MCLT, typically 1 hour by default).
* Options:
* A:Contacting support and forcing PARTNER-DOWN gives the surviving peer full pool access, but it's unnecessary for a 1-hour outage with "a few" new clients. Overkill.
* B:Increasing lease time (e.g., to 4 hours) prevents lease expiration but doesn't address new client capacity and requires manual reversion. Unneeded complexity.
* C:Reconfiguring relays to point only to the surviving peer is redundant-it's already receiving requests-and risks misconfiguration. Incorrect.
* D:Doing nothing leverages the failover design: existing clients renew seamlessly, and the remaining peer services new clients within its capacity. Correct for this short-term, low-impact scenario.
* Practical Example:In an INE lab, you'd monitor the surviving peer's lease usage (via Grid Manager > DHCP > Leases) and confirm it handles the load, a key troubleshooting skill.References:Infoblox NIOS Administrator Guide - DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.

NEW QUESTION # 55
To revert to an older version of code, the user must be able to upgrade from that older version of code to the code the Infoblox device is currently running.

A. True
B. False

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:Reverting in NIOS (Grid > Upgrade > Revert) rolls back to the previous version:
* Requirement:The older version must be compatible with an upgrade path to the current version. NIOS stores the prior image and database, ensuring revertibility if the upgrade was valid (e.g., 8.6.1 to 8.6.2).
* Why True:If the older version couldn't upgrade to the current one (e.g., due to major schema changes or skipped versions), revert wouldn't be offered-NIOS enforces this compatibility.
* Practical Example:In an INE lab, you'd upgrade from 8.6.1 to 8.6.2, revert to 8.6.1, and troubleshoot DNS continuity, verifying this rule.References:Infoblox NIOS Administrator Guide - Software Revert; INE Course Content: NIOS DDI Grid Troubleshooting.

NEW QUESTION # 56
If the VRID of a HA pair is configured as 25. Which MAC address is most likely used for the virtual IP address?

A. 00-00-5E-25-01-00
B. 19-80-C2-00-00-03
C. 01-00-5E-7F-FF-25
D. 00-00-5E-00-01-19

Answer: D

Explanation:
Comprehensive and Detailed In-Depth Explanation:VRRP defines the virtual MAC for the VIP:
* Format:00:00:5E:00:01:XX, where XX is the VRID (1-255) in hex.
* VRID 25:Decimal 25 = Hex 19. Thus, MAC is 00:00:5E:00:01:19.
* Options:
* A:25 is decimal, not hex-incorrect conversion. Incorrect.
* B:Correctly uses hex 19 for VRID 25. Correct.
* C:Random, non-VRRP format.Incorrect.
* D:Multicast format, not VRRP. Incorrect.
* Practical Example:In an INE lab, you'd configure VRID 25, capture VRRP packets, and verify 00:00:
5E:00:01:19, troubleshooting HA.References:RFC 3768 - VRRP; Infoblox NIOS Administrator Guide
- HA; INE Course Content: NIOS DDI Grid Troubleshooting.

NEW QUESTION # 57
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