Infoblox NIOS-DDI-Expert Practice Exams
Last updated on Oct 21,2026- Exam Code: NIOS-DDI-Expert
- Exam Name: Infoblox Qualified NIOS DDI Expert - INE
- Certification Provider: Infoblox
- Latest update: Oct 21,2026
Question #41
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 . 00-00-5E-00-01-19
- C . 19-80-C2-00-00-03
- D . 01-00-5E-7F-FF-25
Correct Answer: B
B
Explanation:
Comprehensive and Detailed In-Depth
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.
Reference: RFC 3768 C VRRP; Infoblox NIOS Administrator Guide C HA; INE Course Content: NIOS DDI Grid Troubleshooting.
B
Explanation:
Comprehensive and Detailed In-Depth
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.
Reference: RFC 3768 C VRRP; Infoblox NIOS Administrator Guide C HA; INE Course Content: NIOS DDI Grid Troubleshooting.
Question #42
What is the correct order of a NIOS upgrade?
- A . Test Upload > Distribute > Upgrade
- B . Upload > Distribute > Test > Upgrade
- C . Distribute > Upload > Test > Upgrade
- D . Upload > Distribute > Upgrade > Test
Correct Answer: A
A
Explanation:
Comprehensive and Detailed In-Depth
A NIOS software upgrade follows a structured process in Grid Manager (Grid > Upgrade):
Correct Order:
Test Upload: Upload the .upgrade file (e.g., NIOS 8.6.2) and test it for integrity/compatibility (checks file checksum, version support).
Distribute: Push the file to all Grid members, ensuring each has the update locally.
Upgrade: Execute the upgrade, rebooting members per the schedule (e.g., passive nodes first).
Why A: "Test Upload" combines the upload and initial validation steps, followed by distribution and execution. NIOS documentation uses this sequence for clarity.
Options:
B: Splits Test and Upload, but Test occurs with Upload in practice. Incorrect flow.
C: Distribute before Upload is impossible―members need the file first. Incorrect.
D: Test after Upgrade defeats the purpose of pre-validation. Incorrect.
Practical Example: In an INE lab, you’d upload/test NIOS 8.6.2, distribute to an HA pair, upgrade the passive node, and troubleshoot sync issues, mastering Grid deployment.
Reference: Infoblox NIOS Administrator Guide C Upgrade Process; INE Course Content: NIOS DDI Grid Deployment.
A
Explanation:
Comprehensive and Detailed In-Depth
A NIOS software upgrade follows a structured process in Grid Manager (Grid > Upgrade):
Correct Order:
Test Upload: Upload the .upgrade file (e.g., NIOS 8.6.2) and test it for integrity/compatibility (checks file checksum, version support).
Distribute: Push the file to all Grid members, ensuring each has the update locally.
Upgrade: Execute the upgrade, rebooting members per the schedule (e.g., passive nodes first).
Why A: "Test Upload" combines the upload and initial validation steps, followed by distribution and execution. NIOS documentation uses this sequence for clarity.
Options:
B: Splits Test and Upload, but Test occurs with Upload in practice. Incorrect flow.
C: Distribute before Upload is impossible―members need the file first. Incorrect.
D: Test after Upgrade defeats the purpose of pre-validation. Incorrect.
Practical Example: In an INE lab, you’d upload/test NIOS 8.6.2, distribute to an HA pair, upgrade the passive node, and troubleshoot sync issues, mastering Grid deployment.
Reference: Infoblox NIOS Administrator Guide C Upgrade Process; INE Course Content: NIOS DDI Grid Deployment.
Question #43
Which stage of a NIOS upgrade is generally expected to take the shortest time?
- A . Upload
- B . Test
- C . Distribute
- D . Upgrade
Correct Answer: A
A
Explanation:
Comprehensive and Detailed In-Depth
NIOS upgrade stages (Grid > Upgrade):
A (Upload): Uploading the .upgrade file (e.g., 50-200 MB) to the GM is quick―seconds to minutes,
depending on network speed. Shortest. Correct.
B (Test): Validates file integrity/compatibility―fast but longer than upload (e.g., 1-2 minutes).
Incorrect.
C (Distribute): Sending the file to all members takes longer, proportional to Grid size/network (e.g., 5-15 minutes). Incorrect.
D (Upgrade): Rebooting and applying the update per member is the longest (e.g., 10-30 minutes total). Incorrect.
Practical Example: In an INE lab, upload takes 30s, while distribution and upgrade take 10+ minutes, testing Grid deployment timing.
Reference: Infoblox NIOS Administrator Guide C Upgrade Process; INE Course Content: NIOS DDI Grid Deployment.
A
Explanation:
Comprehensive and Detailed In-Depth
NIOS upgrade stages (Grid > Upgrade):
A (Upload): Uploading the .upgrade file (e.g., 50-200 MB) to the GM is quick―seconds to minutes,
depending on network speed. Shortest. Correct.
B (Test): Validates file integrity/compatibility―fast but longer than upload (e.g., 1-2 minutes).
Incorrect.
C (Distribute): Sending the file to all members takes longer, proportional to Grid size/network (e.g., 5-15 minutes). Incorrect.
D (Upgrade): Rebooting and applying the update per member is the longest (e.g., 10-30 minutes total). Incorrect.
Practical Example: In an INE lab, upload takes 30s, while distribution and upgrade take 10+ minutes, testing Grid deployment timing.
Reference: Infoblox NIOS Administrator Guide C Upgrade Process; INE Course Content: NIOS DDI Grid Deployment.
Question #44
When a Force Failover is performed on a HA pair, what is the priority that is set in the VRRP packet send from the Active to the Passive Node?
- A . 0
- B . 255
- C . 1024
- D . 128
Correct Answer: B
B
Explanation:
Comprehensive and Detailed In-Depth
VRRP governs HA failover in NIOS, using priority values (0-255) to determine the active node. Here’s the detailed process:
Normal Operation: The active node has a higher priority (e.g., 100) than the passive node (e.g., 90), set during HA configuration.
Force Failover: In Grid Manager (Grid > Members > Force Failover), the admin triggers a manual switch. The active node sends a VRRP advertisement with priority 255 to assert itself as the master, then lowers its priority (e.g., to 90), allowing the passive node (now higher, e.g., 100) to take over.
Why 255: Per VRRP standards (RFC 3768), 255 is the highest priority, reserved for the master to signal ownership or force transitions. Post-failover, priorities revert to configured values.
Options:
A (0): Signals a node is shutting down, not forcing failover. Incorrect.
C (1024): Exceeds VRRP’s 8-bit range (0-255). Invalid.
D (128): A possible priority, but not the forced failover value. Incorrect.
Practical Example: In an INE lab, you’d force failover, capture VRRP packets (e.g., with Wireshark), and verify the 255 priority, troubleshooting HA behavior.
Reference: Infoblox NIOS Administrator Guide C HA Failover; RFC 3768 (VRRP); INE Course Content:
NIOS DDI Grid Troubleshooting.
B
Explanation:
Comprehensive and Detailed In-Depth
VRRP governs HA failover in NIOS, using priority values (0-255) to determine the active node. Here’s the detailed process:
Normal Operation: The active node has a higher priority (e.g., 100) than the passive node (e.g., 90), set during HA configuration.
Force Failover: In Grid Manager (Grid > Members > Force Failover), the admin triggers a manual switch. The active node sends a VRRP advertisement with priority 255 to assert itself as the master, then lowers its priority (e.g., to 90), allowing the passive node (now higher, e.g., 100) to take over.
Why 255: Per VRRP standards (RFC 3768), 255 is the highest priority, reserved for the master to signal ownership or force transitions. Post-failover, priorities revert to configured values.
Options:
A (0): Signals a node is shutting down, not forcing failover. Incorrect.
C (1024): Exceeds VRRP’s 8-bit range (0-255). Invalid.
D (128): A possible priority, but not the forced failover value. Incorrect.
Practical Example: In an INE lab, you’d force failover, capture VRRP packets (e.g., with Wireshark), and verify the 255 priority, troubleshooting HA behavior.
Reference: Infoblox NIOS Administrator Guide C HA Failover; RFC 3768 (VRRP); INE Course Content:
NIOS DDI Grid Troubleshooting.
Question #45
When defining a Custom Option, what attributes must an administrator provide?
- A . Option Name
- B . Code
- C . Type
- D . Allowed Value(s)
Correct Answer: A, B, C
A, B, C
Explanation:
Comprehensive and Detailed In-Depth
Defining a custom DHCP option in NIOS (Data Management > DHCP > Option Spaces):
Required Attributes:
A (Option Name): User-defined label (e.g., “VoIPConfig”). Mandatory for identification. Correct.
B (Code): Option number (1-254), matching vendor spec (e.g., 66 for TFTP). Mandatory. Correct.
C (Type): Data type (e.g., string, IP), defining format. Mandatory. Correct.
D (Allowed Value(s)): Optional―constrains values (e.g., “server1”), but not required for definition. Incorrect here.
Practical Example: In an INE lab, you’d define Option 66 (Name: “TFTP,” Code: 66, Type: string), apply it, and troubleshoot client uptake.
Reference: Infoblox NIOS Administrator Guide C Custom DHCP Options; INE Course Content: NIOS DDI DHCP Troubleshooting.
A, B, C
Explanation:
Comprehensive and Detailed In-Depth
Defining a custom DHCP option in NIOS (Data Management > DHCP > Option Spaces):
Required Attributes:
A (Option Name): User-defined label (e.g., “VoIPConfig”). Mandatory for identification. Correct.
B (Code): Option number (1-254), matching vendor spec (e.g., 66 for TFTP). Mandatory. Correct.
C (Type): Data type (e.g., string, IP), defining format. Mandatory. Correct.
D (Allowed Value(s)): Optional―constrains values (e.g., “server1”), but not required for definition. Incorrect here.
Practical Example: In an INE lab, you’d define Option 66 (Name: “TFTP,” Code: 66, Type: string), apply it, and troubleshoot client uptake.
Reference: Infoblox NIOS Administrator Guide C Custom DHCP Options; INE Course Content: NIOS DDI DHCP Troubleshooting.
Question #46
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 all members simultaneously
- B . Restart if needed on all members sequentially
- C . Force restart on GM only
- D . Restart if needed on HA members only
Correct Answer: B
B
Explanation:
Comprehensive and Detailed In-Depth
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.
Reference: Infoblox NIOS Administrator Guide C Service Restarts; INE Course Content: NIOS DDI Grid Troubleshooting.
B
Explanation:
Comprehensive and Detailed In-Depth
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.
Reference: Infoblox NIOS Administrator Guide C Service Restarts; INE Course Content: NIOS DDI Grid Troubleshooting.
Question #47
How many IP addresses are required to configure a High Availability (HA) pair?
- A . 2
- B . 3
- C . 4
- D . 5
Correct Answer: B
B
Explanation:
Comprehensive and Detailed In-Depth
An HA pair in NIOS requires:
B
Explanation:
Comprehensive and Detailed In-Depth
An HA pair in NIOS requires:
Question #48
What is the purpose of the "Override" button in the context of settings inheritance?
- A . To reset all settings to their default values
- B . To prevent any changes to settings at lower hierarchy levels
- C . To change the settings at a lower level, overriding the inherited values
- D . To apply the same settings across all hierarchy levels simultaneously
Correct Answer: C
C
Explanation:
Comprehensive and Detailed In-Depth
Settings inheritance in NIOS allows higher-level configurations (e.g., Grid-wide) to propagate to lower levels (e.g., members):
Override Button: Found in Grid Manager (e.g., Grid > Members > Edit), it lets admins modify a setting at a lower level (e.g., member-specific DHCP options), breaking inheritance from the parent (e.g., Grid).
Why C: Overriding replaces the inherited value with a custom one for that object, tailoring behavior without affecting others.
Options:
A: Resetting to defaults is a separate action (e.g., "Revert to Default"). Incorrect.
B: Preventing changes contradicts override’s purpose―it enables change. Incorrect.
C: Matches the function―alter lower-level settings. Correct.
D: Applying uniformly isn’t overriding―it’s setting at a higher level. Incorrect.
Practical Example: In an INE lab, you’d override a Grid-wide DNS TTL (3600s) to 300s on one member, test resolution, and troubleshoot inheritance conflicts.
Reference: Infoblox NIOS Administrator Guide C Inheritance; INE Course Objective: NIOS DDI Grid Deployment.
C
Explanation:
Comprehensive and Detailed In-Depth
Settings inheritance in NIOS allows higher-level configurations (e.g., Grid-wide) to propagate to lower levels (e.g., members):
Override Button: Found in Grid Manager (e.g., Grid > Members > Edit), it lets admins modify a setting at a lower level (e.g., member-specific DHCP options), breaking inheritance from the parent (e.g., Grid).
Why C: Overriding replaces the inherited value with a custom one for that object, tailoring behavior without affecting others.
Options:
A: Resetting to defaults is a separate action (e.g., "Revert to Default"). Incorrect.
B: Preventing changes contradicts override’s purpose―it enables change. Incorrect.
C: Matches the function―alter lower-level settings. Correct.
D: Applying uniformly isn’t overriding―it’s setting at a higher level. Incorrect.
Practical Example: In an INE lab, you’d override a Grid-wide DNS TTL (3600s) to 300s on one member, test resolution, and troubleshoot inheritance conflicts.
Reference: Infoblox NIOS Administrator Guide C Inheritance; INE Course Objective: NIOS DDI Grid Deployment.
Question #49
An administrator is copying records between DNS zones.
What records can be selected for copying? (Select all that apply.)
- A . All records
- B . All records of a single type (for example, A Records)
- C . All records of multiple selected types (for example, A Records and PTR Records)
- D . Individually selected records
Correct Answer: B, C, D
B, C, D
Explanation:
Comprehensive and Detailed In-Depth
Copying DNS records in NIOS (Data Management > DNS > Zones):
Process: Select source zone, choose records, copy to target zone.
B: Copy all of one type (e.g., A records) via filter. Correct.
C: Select multiple types (e.g., A and PTR) using multi-select. Correct.
D: Individually pick records (e.g., “host1 A”) via checkboxes. Correct.
A: “All records” isn’t an option―copying requires specificity (type or selection). Incorrect.
Practical Example: In an INE lab, copy A and PTR records from “lab.com” to “test.com,” test resolution, and troubleshoot mismatches.
Reference: Infoblox NIOS Administrator Guide C DNS Record Management; INE Course Content: NIOS DDI DNS Troubleshooting.
B, C, D
Explanation:
Comprehensive and Detailed In-Depth
Copying DNS records in NIOS (Data Management > DNS > Zones):
Process: Select source zone, choose records, copy to target zone.
B: Copy all of one type (e.g., A records) via filter. Correct.
C: Select multiple types (e.g., A and PTR) using multi-select. Correct.
D: Individually pick records (e.g., “host1 A”) via checkboxes. Correct.
A: “All records” isn’t an option―copying requires specificity (type or selection). Incorrect.
Practical Example: In an INE lab, copy A and PTR records from “lab.com” to “test.com,” test resolution, and troubleshoot mismatches.
Reference: Infoblox NIOS Administrator Guide C DNS Record Management; INE Course Content: NIOS DDI DNS Troubleshooting.
Question #50
How does an administrator obtain new NIOS releases?
- A . In Grid UI, go to Grid > Software > Download
- B . Contact Infoblox Technical Support for a Software Bundle
- C . Contact the Infoblox Account Manager for a Support Bundle
- D . Download from https://support.infoblox.com
Correct Answer: D
D
Explanation:
Comprehensive and Detailed In-Depth
Obtaining new NIOS software releases follows a standardized process tied to Infoblox’s support infrastructure:
Official Method: New releases (e.g., NIOS 8.6.x) are available for download from the Infoblox Support Portal (https://support.infoblox.com) under the "Downloads" section. Admins log in with valid credentials, select the appliance model, and download the .upgrade file.
Options Analysis:
A: "Grid > Software > Download" isn’t a valid path in Grid Manager. The UI supports uploading and distributing releases (Grid > Upgrade), but not direct downloading. Incorrect.
B: Technical Support can assist with issues or provide files in rare cases (e.g., beta releases), but it’s not the standard method―self-service via the portal is preferred. Incorrect.
C: Account Managers handle sales, not software distribution. "Support Bundle" is also a misnomer― it’s for diagnostics, not upgrades. Incorrect.
D: The support portal is the documented, primary source for NIOS releases, aligning with INE’s focus on Grid upgrade procedures. Correct.
Steps: Download the file, upload it via Grid Manager (Grid > Upgrade > Upload), and initiate the upgrade process.
Practical Example: In an INE lab, you’d download NIOS 8.6.2 from the portal, upload it, and test a Grid-wide upgrade, troubleshooting any distribution failures.
Reference: Infoblox NIOS Administrator Guide C Obtaining Software Releases; INE Course Content:
NIOS DDI Grid Deployment.
D
Explanation:
Comprehensive and Detailed In-Depth
Obtaining new NIOS software releases follows a standardized process tied to Infoblox’s support infrastructure:
Official Method: New releases (e.g., NIOS 8.6.x) are available for download from the Infoblox Support Portal (https://support.infoblox.com) under the "Downloads" section. Admins log in with valid credentials, select the appliance model, and download the .upgrade file.
Options Analysis:
A: "Grid > Software > Download" isn’t a valid path in Grid Manager. The UI supports uploading and distributing releases (Grid > Upgrade), but not direct downloading. Incorrect.
B: Technical Support can assist with issues or provide files in rare cases (e.g., beta releases), but it’s not the standard method―self-service via the portal is preferred. Incorrect.
C: Account Managers handle sales, not software distribution. "Support Bundle" is also a misnomer― it’s for diagnostics, not upgrades. Incorrect.
D: The support portal is the documented, primary source for NIOS releases, aligning with INE’s focus on Grid upgrade procedures. Correct.
Steps: Download the file, upload it via Grid Manager (Grid > Upgrade > Upload), and initiate the upgrade process.
Practical Example: In an INE lab, you’d download NIOS 8.6.2 from the portal, upload it, and test a Grid-wide upgrade, troubleshooting any distribution failures.
Reference: Infoblox NIOS Administrator Guide C Obtaining Software Releases; INE Course Content:
NIOS DDI Grid Deployment.