Question 1

To revert to an older version of code, the user must be able to upgrade from that older version of code to the code the Infoblox device is currently running.

Accepted Answer

A

Explanation: Comprehensive and Detailed In-Depth Reverting in NIOS (Grid > Upgrade > Revert) rolls back to the previous version: Requirement: The older version must be compatible with an upgrade path to the current version. NIOS stores the prior image and database, ensuring revertibility if the upgrade was valid (e.g., 8.6.1 to 8.6.2). Why True: If the older version couldn’t upgrade to the current one (e.g., due to major schema changes or skipped versions), revert wouldn’t be offered—NIOS enforces this compatibility. Practical Example: In an INE lab, you’d upgrade from 8.6.1 to 8.6.2, revert to 8.6.1, and troubleshoot DNS continuity, verifying this rule. Reference: Infoblox NIOS Administrator Guide – Software Revert; INE Course Content: NIOS DDI Grid Troubleshooting.

Question 2

When configuring Authentication Policy, an administrator should always choose a group for "Assign users to this group if remote admin group cannot be found".

Accepted Answer

B

Explanation: Comprehensive and Detailed In-Depth The Authentication Policy in NIOS (Administration > Authentication) governs remote authentication (e.g., LDAP, RADIUS). The "Assign users to this group if remote admin group cannot be found" option is a fallback mechanism: Purpose: If a user’s remote group (e.g., from AD) isn’t mapped to an NIOS group, this setting assigns them to a default group with predefined permissions. Requirement: It’s optional—not mandatory. Leaving it unset means unmatched users are denied access unless individually mapped, enhancing security in some cases. Why False: "Always" implies it’s required, but NIOS allows flexibility. For strict environments, admins might skip this to prevent unauthorized access, relying on explicit mappings. Options Analysis: A: Suggests a mandatory setting, but documentation and UI show it’s a choice. Incorrect. B: Correctly reflects that it’s not always necessary—optional based on policy. Correct. Practical Example: In an INE lab, you’d configure LDAP without a fallback group, test an unmapped user’s denial, and troubleshoot authentication logs, reinforcing Grid security concepts. Reference: Infoblox NIOS Administrator Guide – Authentication Policy; INE Course Objective: NIOS DDI Grid Deployment.

Question 3

A customer reports difficulty joining a standalone High Availability (HA) pair. How should the customer diagnose the issue? Choose 2 answers

Accepted Answer

A, C

Explanation: Comprehensive and Detailed In-Depth Joining a standalone HA pair to a Grid involves network, authentication, and sync issues. Best diagnostics: A: Syslog (show log syslog) and debug logs (e.g., infoblox.log in support bundle) on both nodes reveal errors (e.g., “Join failed: invalid secret”). Essential for root cause. Correct. C: Traffic capture (tcpdump via CLI) on both nodes checks VRRP, bloxSync, and network issues (e.g., blocked ports). Comprehensive view of communication. Correct. B: Capturing only the active node misses passive node issues (e.g., firewall blocking sync). Incomplete. Incorrect. D: Resetting erases logs and configs, hindering diagnosis—last resort, not initial step. Incorrect. Practical Example: In an INE lab, you’d check syslog for “sync failed,” run tcpdump -i eth0 port 443 on both, and troubleshoot a blocked SSL port. Reference: Infoblox NIOS Administrator Guide – HA Troubleshooting; INE Course Content: NIOS DDI Grid Troubleshooting.

Question 4

The DHCP server has assigned an address, but the client did not renew before the lease timer ended. What status will be listed for this address?

Accepted Answer

C

Explanation: Comprehensive and Detailed In-Depth DHCP lease states in NIOS: Scenario: Client gets IP (e.g., 192.168.1.10, 1-hour lease), doesn’t renew, and timer expires. C (Expired): Lease times out, marked “Expired” in NIOS (Data Management > DHCP > Leases), available for reassignment. Correct. A: Active is for current, unexpired leases. Incorrect. B: Released requires client action (DHCPRELEASE). Incorrect. D: Abandoned is for declined or conflicting leases, not timeouts. Incorrect. Practical Example: In an INE lab, set a 5-minute lease, wait for expiry, check “Expired” status, and troubleshoot lease reuse. Reference: Infoblox NIOS Administrator Guide – DHCP Leases; INE Course Content: NIOS DDI DHCP Troubleshooting.

Question 5

What sends the email messages for Workflow Approval notifications in NIOS?

Accepted Answer

A

Explanation: Comprehensive and Detailed In-Depth Workflow Approval notifications: A: The Grid Master (GM) sends emails via its configured SMTP settings (Grid > Grid Properties > Email), as it manages Grid-wide tasks. Correct. B: GMC is a standby, not active unless promoted—doesn’t send emails. Incorrect. C: Only GM sends, not both—GMC is passive. Incorrect. D: SuperAdmin is a role, not a process—no sending capability. Incorrect. Practical Example: In an INE lab, configure SMTP on the GM, test approval emails, and troubleshoot delivery from GM logs. Reference: Infoblox NIOS Administrator Guide – Workflow Notifications; INE Course Objective: NIOS DDI Grid Deployment.

Question 6

After making a configuration change on the NIOS Grid, you are prompted to restart services. What option provides the least service disruption?

Accepted Answer

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 – Service Restarts; INE Course Content: NIOS DDI Grid Troubleshooting.

Question 7

An administrator is copying records between DNS zones. What records can be selected for copying? (Select all that apply.)

Accepted Answer

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 – DNS Record Management; INE Course Content: NIOS DDI DNS Troubleshooting.

Question 8

How can an administrator access the NIOS Online Documentation through the Grid Manager UI?

Accepted Answer

D

Explanation: Comprehensive and Detailed In-Depth NIOS Online Documentation is accessible via Grid Manager: D: Help > Documentation > NIOS Online Documentation opens a browser to the latest NIOS docs (e.g., Admin Guide) hosted online or locally. Correct. A: Logs > Download is for syslog/support bundles, not docs. Incorrect. B: Tools > Support Bundle is diagnostics, not documentation. Incorrect. C: No “Download Admin guide” option exists under Tools. Incorrect. Practical Example: In an INE lab, you’d access docs via Help to troubleshoot a Grid join issue, testing resource navigation. Reference: Infoblox NIOS Administrator Guide – UI Navigation; INE Course Content: NIOS DDI Grid Troubleshooting.

Question 9

The standard or recommended architecture for NIOS DNS views is "one member, one view".

Accepted Answer

B

Explanation: Comprehensive and Detailed In-Depth DNS Views in NIOS allow multiple DNS perspectives (e.g., internal vs. external): Architecture: NIOS supports multiple views per member—common for consolidating services (e.g., one appliance handles “Internal” and “External” views). “One member, one view” isn’t a standard or recommended limit. Why False: Best practice is flexible—views depend on use case, not a strict 1:1 ratio. Multiple views per member is typical and efficient. Practical Example: In an INE lab, configure two views on one member, test split DNS, and troubleshoot view conflicts. Reference: Infoblox NIOS Administrator Guide – DNS Views; INE Course Content: NIOS DDI DNS Troubleshooting.

Question 10

If a Grid Master Fails, what can be promoted to take the place of the Grid Master? (Choose one.)

Accepted Answer

B

Explanation: Comprehensive and Detailed In-Depth Grid Master (GM) failure recovery: B: A Grid Master Candidate (GMC), pre-designated in Grid Manager (Grid > Members), can be promoted (Grid > Promote GMC) to replace a failed GM, assuming its role. Correct. A: Grid Manager is the UI, not a device. Incorrect. C: Not all members are GMCs—only designated ones qualify. Incorrect. D: No “standby GM” role—GMC is the term. Incorrect. Practical Example: In an INE lab, promote a GMC after GM failure, test sync, and troubleshoot promotion issues. Reference: Infoblox NIOS Administrator Guide – Grid Master Promotion; INE Course Content: NIOS DDI Grid Troubleshooting.

Question 11

What does the Stealth option do on a name server for a DNS Zone?

Accepted Answer

A

Explanation: Comprehensive and Detailed In-Depth Stealth option in NIOS DNS (Data Management > DNS > Zone > Name Servers): A: “Stealth” hides the server from NS records in the zone file, making it authoritative but unlisted— useful for internal servers. Correct. B: Zone transfers are controlled by ACLs, not Stealth. Incorrect. C: Caching is unrelated—Stealth affects visibility, not function. Incorrect. D: Response behavior isn’t altered—still answers queries. Incorrect. Practical Example: In an INE lab, set a stealth NS, verify NS record absence, and troubleshoot external visibility. Reference: Infoblox NIOS Administrator Guide – DNS Name Servers; INE Course Content: NIOS DDI DNS Troubleshooting.

Question 12

The Grid is comprised of all single members. Which member will upgrade first?

Accepted Answer

A

Explanation: Comprehensive and Detailed In-Depth Upgrading a Grid of single members (no HA pairs): A: Admins define Upgrade Groups or schedules (Grid > Upgrade), choosing the order (e.g., “Member1 first”). Correct. B: GM typically upgrades last by default to maintain control, but this can be overridden. Incorrect. C: Reporting server (if present) has no priority—user-defined. Incorrect. D: GMC upgrades only if promoted, not inherently first. Incorrect. Practical Example: In an INE lab, schedule Member2 first, test upgrade, and troubleshoot sequence issues. Reference: Infoblox NIOS Administrator Guide – Upgrade Scheduling; INE Course Content: NIOS DDI Grid Deployment.

Question 13

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.)

Accepted Answer

B, C, D

Explanation: Comprehensive and Detailed In-Depth 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. Reference: Infoblox NIOS Administrator Guide – HA Configuration with VRRP; INE Course Content: NIOS DDI Grid Deployment.

Question 14

An administrator defined several Upgrade Groups before updating the software on a Grid. What members must be put in the same Upgrade Group?

Accepted Answer

D

Explanation: Comprehensive and Detailed In-Depth Upgrade Groups in NIOS allow administrators to control the sequence and timing of software upgrades across Grid members, minimizing disruption. Here’s the detailed reasoning: Upgrade Groups Purpose: They define which members upgrade together in a single phase, based on operational needs (e.g., location, role, or downtime tolerance), not inherent traits like type or services. Options Analysis: A: Hardware vs. virtual NIOS (vNIOS) distinction isn’t mandatory—different types can upgrade together if operationally feasible. Incorrect. B: Service roles (DNS, DHCP) don’t dictate grouping; a DNS-only member and a DHCP-only member could upgrade simultaneously if desired. Incorrect. C: Pre-upgrade software versions don’t force grouping—NIOS manages version compatibility during the upgrade process. Incorrect. D: The defining trait of an Upgrade Group is that its members upgrade at the same time, as set by the admin in the upgrade schedule (Grid > Upgrade). Correct. Process: In Grid Manager, you create groups (e.g., "Group 1: East Coast Members") and assign members to upgrade concurrently, followed by "Group 2," etc. Practical Example: In an INE lab, you might group two HA pair passive nodes in "Group 1" to upgrade at 1 AM, ensuring the active nodes (Group 2) upgrade later, testing Grid deployment resilience. Reference: Infoblox NIOS Administrator Guide – Software Upgrades; INE Course Objective: NIOS DDI Grid Deployment.

Question 15

Which CSV export format is recommended for tasks that involve data manipulation and reimporting to the NIOS Grid?

Accepted Answer

A

Explanation: Comprehensive and Detailed In-Depth NIOS supports two CSV export formats in Grid Manager (Data Management > Export): Infoblox CSV Import Format: Structured specifically for NIOS, with headers matching import fields (e.g., "fqdn,ip_address,mac_address"). Includes all necessary metadata for reimporting, making it ideal for editing (e.g., in Excel) and reuploading via the Data Import Wizard (DIW). Standard CSV (Visible) Format: A human-readable format showing only visible Grid Manager data, lacking the full structure for reimport. It’s better for reporting or external analysis, not manipulation/reimport. Why A: The Infoblox format ensures compatibility with NIOS’s import process, preserving object relationships and mandatory fields (e.g., marked with *). Editing and reimporting in this format maintains data integrity. Option Analysis: B: Standard format isn’t designed for reimport—missing fields cause import failures. Incorrect. C: They serve different purposes; only Infoblox format suits reimporting. Incorrect. D: Infoblox format is suitable, so this is false. Incorrect. Practical Example: In an INE lab, you’d export DNS records in Infoblox CSV format, update IPs, and reimport to test bulk management, a Grid deployment skill. Reference: Infoblox NIOS Administrator Guide – CSV Export/Import; INE Course Objective: NIOS DDI Grid Deployment.

Free Infoblox NIOS-DDI-Expert Actual Exam Questions