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Infoblox Qualified NIOS DDI Expert - INE Sample Questions (Q12-Q17):
NEW QUESTION # 12
Which system provides database synchronization to the passive node of an HA pair Grid Member?
- A. The Grid Master Candidate
- B. The Active Node of the HA pair
- C. The Grid Master
- D. The DNS Primary
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:In an Infoblox High Availability (HA) pair, the active node maintains the live database and services (DNS, DHCP, etc.), while the passive node remains on standby, ready to take over if needed. Database synchronization between the active and passive nodes is handled directly by the active node using thebloxSyncmechanism over a secure connection (typically SSL). The Grid Master oversees Grid-wide synchronization, but within an HA pair, the active node is responsible for keeping the passive node's database up-to-date. The Grid Master Candidate (GMC) and DNS Primary are unrelated to this specific HA pair sync process. This is a key troubleshooting point in the INE course.References:Infoblox NIOS Documentation - HA Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.
NEW QUESTION # 13
After making a configuration change on the NIOS Grid, you are prompted to restart services. What option provides the least service disruption?
- A. Restart if needed on all members sequentially
- B. Restart if needed on HA members only
- C. Force restart on all members simultaneously
- D. Force restart on GM only
Answer: A
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 # 14
A superuser can change the password on another admin account.
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:In NIOS, asuperuseris an admin with unrestricted permissions across the Grid, including user management. Here's the breakdown:
* Superuser Role:Defined in Grid Manager (Administration > Administrators), superusers have full read
/write access to all objects and settings, including admin accounts.
* Password Change:A superuser can navigate to Administration > Administrators, select another admin account (e.g., "user1"), and modify its password, overriding any restrictions on that account.
* Why True:This is a built-in capability to ensure ultimate control, useful for scenarios like account recovery or security enforcement. No restrictions apply to superusers for this action.
* Practical Example:In an INE troubleshooting lab, a superuser might reset a locked-out admin's password to regain Grid access, testing authentication policies.
* Contrast:Regular admins with limited permissions can't modify others' accounts unless explicitly granted.References:Infoblox NIOS Administrator Guide - Admin Management; INE Course Objective: NIOS DDI Grid Deployment.
NEW QUESTION # 15
You are asked to configure DHCPv4 failover on the Grid. Which of the following do you need for it to function correctly? (Select all that apply.)
- A. DHCP members are located in the same subnet
- B. DHCP members are directly connected via crossover network cables
- C. DHCP relays are configured to relay to DHCP members simultaneously
- D. TCP port 647 is open between DHCP members
Answer: C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:DHCPv4 Failover requirements:
* C:TCP 647 is the failover sync port-must be open for lease coordination. Correct.
* D:Relays must send requests to both peers (e.g., via IP helper addresses) for load balancing
/redundancy. Correct.
* A:Crossover cables aren't required-standard network connectivity suffices. Incorrect.
* B:Same subnet isn't mandatory-peers can be remote if routable. Incorrect.
* Practical Example:In an INE lab, ensure port 647 is open, configure relays, test failover, and troubleshoot sync issues.References:Infoblox NIOS Administrator Guide - DHCP Failover Setup; INE Course Content: NIOS DDI DHCP Troubleshooting.
NEW QUESTION # 16
What can an administrator do with an Option Filter in NIOS?
- A. Match on any DHCP options provided by the server
- B. Match only vendor-specific options such as Option 60
- C. Match on any DHCP options provided by the client
- D. Match only on device types
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:In NIOS, DHCP Option Filters allow administrators to define rules for matching DHCP client requests based on the options they send in their DHCP packets. These filters are highly flexible and can matchany DHCP option provided by the client, such as Option 55 (Parameter Request List), Option 60 (Vendor Class Identifier), or custom options. This enables precise DHCP policy enforcement, like assigning specific IP ranges or options to certain devices. Option B is incorrect because filters apply to client requests, not server responses. Option C is too narrow-while Option 60 is common, filters aren't limited to vendor-specific options. Option D is vague and incorrect; device type matching is a subset of option matching. The INE course covers DHCP troubleshooting, including filter configuration.References:Infoblox NIOS Administrator Guide - DHCP Option Filters; INE Course Content:
NIOS DDI DHCP Troubleshooting.
NEW QUESTION # 17
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