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Infoblox Qualified NIOS DDI Expert - INE Sample Questions (Q30-Q35):

NEW QUESTION # 30
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 the NTP service is disabled for the Member
C. It means this NTP server is offline
D. It means this NTP server is unreachable

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 # 31
By default, how do peers in an Infoblox DHCP Failover association operate in NORMAL mode?

A. The primary answers all lease requests
B. The primary answers all lease requests up to the utilization threshold, then the secondary answers requests
C. The primary peer answers roughly half of the lease requests and the secondary answers the other half
D. Whichever peer receives the request first will answer the request

Answer: C

Explanation:
Comprehensive and Detailed In-Depth Explanation:DHCP Failover in NIOS ensures redundancy and load balancing between primary and secondary peers in NORMAL mode:
* Default Behavior:The lease pool is split (typically 50/50 unless customized via "split" settings), and each peer manages its portion. Clients send DHCPDISCOVER broadcasts, and relays (or direct requests) distribute them to both peers. The peers coordinate via TCP 647, ensuring:
* Primary answers from its half.
* Secondary answers from its half.
* Load is roughly balanced (not precisely 50/50 due to relay behavior).
* Options:
* A:Matches the default split-pool design, where peers share the load. Correct.
* B:"First come, first serve" isn't how failover works-peers don't race; they use pool allocation.
Incorrect.
* C:No utilization threshold triggers a switch-both peers serve concurrently from their pools.
Incorrect.
* D:Primary-only answering defeats failover's redundancy and balancing. Incorrect.
* Practical Example:In an INE lab, you'd configure a 50/50 split, simulate client requests, and troubleshoot lease distribution via DHCP logs, verifying NORMAL mode behavior.References:
Infoblox NIOS Administrator Guide - DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.

NEW QUESTION # 32
What is the destination IP address of a DHCPDISCOVER packet from a client?

A. 0.0.0.0
B. 255.255.255.255
C. Broadcast address of client subnet
D. 224.0.0.52

Answer: B

Explanation:
Comprehensive and Detailed In-Depth Explanation:DHCPDISCOVER is the initial broadcast a client sends to find a DHCP server:
* Packet Details:
* Source IP:0.0.0.0 (client has no IP yet).
* Destination IP:255.255.255.255 (limited broadcast, all devices on the local network).
* Sent via UDP (port 67 server, 68 client).
* Why 255.255.255.255:The client doesn't know the server's IP and broadcasts to all local devices.
Relays may forward it, but the initial packet targets the universal broadcast address.
* Options:
* A:0.0.0.0 is the source, not destination. Incorrect.
* B:224.0.0.52 is a multicast address, not used in DHCPDISCOVER. Incorrect.
* C:Matches DHCP broadcast standard (RFC 2131). Correct.
* D:Subnet-specific broadcast (e.g., 192.168.1.255) applies post-relay, not the initial packet.
Incorrect.
* Practical Example:In an INE lab, you'd capture a DHCPDISCOVER with Wireshark, confirm
255.255.255.255, and troubleshoot relay issues.References:RFC 2131 - DHCP; Infoblox NIOS Administrator Guide - DHCP Basics; INE Course Content: NIOS DDI DHCP Troubleshooting.

NEW QUESTION # 33
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. Force restart on all members simultaneously
C. Restart if needed on all members sequentially
D. Restart if needed on HA members only

Answer: C

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 # 34
What is one of the prerequisites for configuring Workflow Approval in NIOS?

A. At least 2 admin groups WITHOUT any email addresses configured
B. A single admin group with the correct email address configured
C. At least 2 admin groups with the correct email addresses configured
D. At least 1 admin group with any email address configured

Answer: C

Explanation:
Comprehensive and Detailed In-Depth Explanation:Workflow Approval in NIOS (Administration > Workflow) enforces a review process for configuration changes:
* Prerequisites:
* At least two admin groups: one to request changes (Requesters) and one to approve (Approvers).
* Email addresses configured for notification delivery (Grid > Grid Properties > Email).
* Why A:The system requires distinct roles-requesters submit, approvers review-and email ensures notifications reach approvers. Two groups with correct emails align with this dual-role design.
* Options:
* A:Matches the need for separate groups and functional email setup. Correct.
* B:One group can't handle both roles; lacks separation. Incorrect.
* C:"Any" email might not work if misconfigured; vague and insufficient. Incorrect.
* D:No emails defeat notification purpose. Incorrect.
* Practical Example:In an INE lab, you'd set up "DNS_Admins" and "DNS_Approvers" with emails, test a zone change approval, and troubleshoot email failures.References:Infoblox NIOS Administrator Guide - Workflow Approval; INE Course Objective: NIOS DDI Grid Deployment.

NEW QUESTION # 35
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