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Infoblox Qualified NIOS DDI Expert - INE Sample Questions (Q41-Q46):
NEW QUESTION # 41
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 # 42
What protocol and port does DHCP Failover use to keep lease information synchronized between two peers?
- A. Default is TCP 1194, can be user configured
- B. Default is UDP 1194, can be user configured
- C. Default is TCP 647, can be user configured
- D. Default is UDP 647, can be user configured
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:Infoblox NIOS implements DHCP Failover based on the IETF DHCP Failover protocol (draft standard), usingTCP port 647by default for lease synchronization between peers. This port facilitates the exchange of lease data to ensure both the primary and secondary servers maintain consistent states (e.g., NORMAL, COMMUNICATIONS-INTERRUPTED). TCP is used for reliability, as lease sync requiresguaranteed delivery. The port can be changed by the administrator if needed (e.g., for firewall rules), making "user configured" accurate. Options A and B (port 1194) are incorrect-1194 is commonly associated with OpenVPN, not DHCP Failover. Option D is wrong because it's TCP, not UDP.
This is a key DHCP troubleshooting topic in the INE course.References:Infoblox NIOS Administrator Guide
- DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.
NEW QUESTION # 43
VRRP is used for Infoblox High Availability. VRRP requires a virtual IP address, a virtual router ID, a virtual MAC address, and a VRRP priority. The administrator configures which values? (Select all that apply.)
- A. Virtual router ID
- B. Virtual IP address
- C. VRRP priority
- D. Virtual MAC address
Answer: A,B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:Virtual Router Redundancy Protocol (VRRP) is the mechanism Infoblox uses for HA pairs, ensuring seamless failover between active and passive nodes by sharing a virtual IP (VIP). Let's analyze what the administrator configures:
* A (Virtual MAC Address):VRRP automatically generates the virtual MAC address based on the Virtual Router ID (VRID) using the format 00:00:5E:00:01:XX, where XX is the VRID in hexadecimal. The admin doesn't manually set this-it's derived. Incorrect.
* B (Virtual IP Address):The VIP is the shared IP that clients use to reach the HA pair. The administrator must configure this in the HA setup (e.g., 192.168.1.100) to define the service endpoint.
Correct.
* C (Virtual Router ID):The VRID (1-255) uniquely identifies the VRRP group on the network. The admin sets this to avoid conflicts with other VRRP instances. Correct.
* D (VRRP Priority):The priority (0-255) determines which node is active (higher priority wins). The admin configures this (e.g., 100 for active, 90 for passive) to control failover behavior. Correct.
* Practical Example:In an INE lab, you'd configure a VIP (e.g., 10.0.0.10), VRID (e.g., 25), and priorities (e.g., 100/90) to set up an HA pair, then troubleshoot failover using VRRP logs.References:
Infoblox NIOS Administrator Guide - HA Configuration with VRRP; INE Course Content: NIOS DDI Grid Deployment.
NEW QUESTION # 44
The Infoblox appliance has an LCD panel. To join a node to a Grid, the administrator should use the LCD panel at the front of the Infoblox appliance.
- A. False
- B. True
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:Infoblox physical appliances (e.g., IB-1400 series) feature an LCD panel for basic configuration, but its role in Grid joining is limited:
* LCD Capabilities:The panel allows setting IP addresses, hostnames, and basic network parameters (e.
g., via arrow keys and menu options). It's useful for initial setup or recovery.
* Grid Joining Process:Joining a node to a Grid requires:
* Configuring the node's IP and Grid Master IP.
* Authenticating with Grid credentials (e.g., shared secret).
* Initiating the join via Grid Manager (Grid > Members > Add) or CLI (set membership).
* Why False:The LCD can set preliminary network settings, but full Grid joining-specifying the Grid Master, VPN details, and completing sync-requires CLI or GUI access. The panel lacks the interface for these steps.
* Practical Example:In an INE lab, you'd use the LCD to set an IP on a new node, then SSH to run set membership and join the Grid, troubleshooting connectivity via logs.References:Infoblox NIOS Administrator Guide - LCD Panel; INE Course Content: NIOS DDI Grid Deployment.
NEW QUESTION # 45
Revert allows an administrator to swap the Infoblox software to the previously installed version of code, while retaining the current DNS, DHCP, and Grid configuration information.
- A. True
- B. False
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:The "Revert" feature in NIOS is a safety mechanism for software upgrades, allowing rollback to the prior version if issues arise. Here's how it works:
* Mechanism:NIOS retains the previous software version and configuration database after an upgrade.
The "Revert" option (Grid > Upgrade > Revert) swaps back to the old code, preserving the current DNS zones, DHCP leases, and Grid settings (e.g., member roles).
* Conditions:
* Revert is available only if the upgrade was successful and the prior version is still stored (not overwritten by multiple upgrades).
* Configuration changes made post-upgrade are kept, unlike a factory reset.
* Why True:This aligns with Infoblox's design to minimize downtime and data loss during version management, a key focus in INE's Grid troubleshooting labs.
* Counterpoint:If the database schema changes significantly between versions, some settings might not fully revert, but core DNS/DHCP/Grid data remains intact per documentation.
* Practical Example:After upgrading to NIOS 8.6.2 and encountering DNS issues, you'd revert to 8.6.1 in an INE lab, verifying that zone data persists for troubleshooting continuity.References:Infoblox NIOS Administrator Guide - Software Revert; INE Course Content: NIOS DDI Grid Troubleshooting.
NEW QUESTION # 46
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