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Infoblox Qualified NIOS DDI Expert - INE Sample Questions (Q78-Q83):

NEW QUESTION # 78
You accidentally deleted several DNS entries from the Grid. How can you recover from this mistake with the least service disruption?

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

Answer: C

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 # 79
An administrator is using the Management port with a Grid Master HA pair. The GUI can be accessed from the HA pair VIP.

A. False
B. True

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:Management port and HA pair in NIOS:
* Setup:The MGMT port (separate from LAN1) is for out-of-band access (e.g., SSH, GUI) to individual nodes, not the HA VIP.
* VIP Role:The Virtual IP (LAN1) serves DNS/DHCP and GUI access in-band, not via MGMT.
* Why False:MGMT port IPs (e.g., 192.168.2.101, 192.168.2.102) are node-specific-VIP (e.g.,
192.168.1.100) isn't routable via MGMT. GUI access uses LAN1 VIP or node IPs, not MGMT VIP.
* Practical Example:In an INE lab, access GUI via LAN1 VIP (not MGMT), test MGMT SSH, and troubleshoot port confusion.References:Infoblox NIOS Administrator Guide - Management Port; INE Course Content: NIOS DDI Grid Deployment.

NEW QUESTION # 80
After making a configuration change on the NIOS Grid, you are prompted to restart services. What option provides the least service disruption?

A. Force restart on GM only
B. Restart if needed on all members sequentially
C. Restart if needed on HA members only
D. Force restart on all members simultaneously

Answer: B

Explanation:
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.

NEW QUESTION # 81
The DHCP server has assigned an address, but the client did not renew before the lease timer ended. What status will be listed for this address?

A. Expired
B. Released
C. Active
D. Abandoned

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:DHCP lease states in NIOS:
* Scenario:Client gets IP (e.g., 192.168.1.10, 1-hour lease), doesn't renew, and timer expires.
* C (Expired):Lease times out, marked "Expired" in NIOS (Data Management > DHCP > Leases), available for reassignment. Correct.
* A:Active is for current, unexpired leases. Incorrect.
* B:Released requires client action (DHCPRELEASE). Incorrect.
* D:Abandoned is for declined or conflicting leases, not timeouts. Incorrect.
* Practical Example:In an INE lab, set a 5-minute lease, wait for expiry, check "Expired" status, and troubleshoot lease reuse.References:Infoblox NIOS Administrator Guide - DHCP Leases; INE Course Content: NIOS DDI DHCP Troubleshooting.

NEW QUESTION # 82
When viewing NTP statistics in NIOS CLI, you notice an entry has the asterisk symbol () next to it. What does the asterisk symbol () signify?

A. It means the Member is synchronized to this NTP server
B. It means this NTP server is offline
C. It means this NTP server is unreachable
D. It means the NTP service is disabled for the Member

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:NTP (Network Time Protocol) synchronization is critical for Grid operations, and NIOS CLI provides status via show ntp:
* Output Format:Lists NTP servers with symbols:
* *: The server the member is currently synchronized to (stratum and offset shown).
* +: Candidate server (reachable but not primary).
* -: Unreachable or rejected server.
* Asterisk Meaning:Indicates the active sync source, ensuring time consistency across the Grid.
* Options:
* A:Unreachable servers get a "-" or no symbol, not "*". Incorrect.
* B:Matches NTP convention and NIOS behavior-synchronized server. Correct.
* C:Offline servers don't sync and lack "*". Incorrect.
* D:Disabled NTP would prevent stats display, not mark a server. Incorrect.
* Practical Example:In an INE lab, you'd run show ntp, see "*pool.ntp.org," and troubleshoot time drift if the asterisk shifts, testing Grid stability.References:Infoblox NIOS CLI Reference Guide - NTP Commands; INE Course Content: NIOS DDI Grid Troubleshooting.

NEW QUESTION # 83
......

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