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Infoblox Qualified NIOS DDI Expert - INE Sample Questions (Q59-Q64):

NEW QUESTION # 59
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. 1
C. 2
D. 3

Answer: D

Explanation:
Comprehensive and Detailed In-Depth Explanation: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 withpriority 255to 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.References:Infoblox NIOS Administrator Guide - HA Failover; RFC 3768 (VRRP); INE Course Content: NIOS DDI Grid Troubleshooting.

NEW QUESTION # 60
How does the passive member of a High Availability (HA) pair receive its database updates?

A. bloxSync from the Active node
B. SSL VPN from the Grid Master
C. bloxSync from the Grid Master
D. SSL VPN from the Active node

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:In an HA pair, the passive node stays synchronized with the active node to ensure seamless failover. This synchronization usesbloxSync, a proprietary Infoblox protocol that securely transfers database updates (e.g., DNS records, DHCP leases) between the HA pair members over an SSL-encrypted connection. Theactive node, being the operational member, directly provides these updates to the passive node. The Grid Master handles Grid-wide sync, but within an HA pair, the active node is the source. Options A and B misrepresent the mechanism (it's not a traditional VPN), and Option D incorrectly attributes the sync to the Grid Master. This is a critical HA troubleshooting topic in the INE course.
References:Infoblox NIOS Documentation - HA Pair Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.

NEW QUESTION # 61
What is the destination IP address of a DHCPDISCOVER packet from a client?

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

Answer: A

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 # 62
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 GM only
D. Force restart on all members simultaneously

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 # 63
An administrator has both Avaya and Cisco VoIP phones that require the same DHCP option. What can the administrator do with these two different models of phones?

A. Both device types can be online at the same time, but they must be on different subnets
B. Both device types can be on the same range through the use of separate Option Filters
C. Only one type of device can be online at any given time
D. The administrator must contact the vendors to update the devices to use different DHCP options

Answer: B

Explanation:
Comprehensive and Detailed In-Depth Explanation:NIOS supports advanced DHCP configuration, including Option Filters, which match client requests based on DHCP options (e.g., Option 60 for Vendor Class Identifier). If Avaya and Cisco VoIP phones require the same DHCP option (e.g., Option 66 for TFTP server), the administrator can use separate Option Filters to distinguish the devices by their unique identifiers (like Vendor Class IDs: "Avaya" vs. "Cisco") and assign them IPs from the same range with the shared option. This allows both device types to coexist on the same subnet and range, eliminating the need for segregation (Option B) or vendor intervention (Option D). Option A is overly restrictive and incorrect. This is a practical DHCP troubleshooting scenario in the INE course.References:Infoblox NIOS Administrator Guide - DHCP Option Filters; INE Course Content: NIOS DDI DHCP Troubleshooting.

NEW QUESTION # 64
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