Infoblox NIOS-DDI-Expert Infoblox Qualified NIOS DDI Expert - INE Exam Practice Test

Answer : A

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.

Answer : A, B

Comprehensive and Detailed In-Depth

Permissions in NIOS (Administration > Administrators):

A (Admin Accounts): Individual accounts can have specific permissions (e.g., read-only DNS). Correct.

B (Groups): Admin groups get collective permissions (e.g., ''DNS_Admins'' write access). Correct.

C: ''Roles'' isn't a distinct NIOS entity---permissions tie to groups/accounts. Incorrect.

D: Superusers have unrestricted access, not assigned permissions---they override limits. Incorrect.

Practical Example: In an INE lab, assign DNS write to a group and read-only to an account, test access, and troubleshoot restrictions.

Answer : A, B, C

Comprehensive and Detailed In-Depth

Defining a custom DHCP option in NIOS (Data Management > DHCP > Option Spaces):

Required Attributes:

A (Option Name): User-defined label (e.g., ''VoIPConfig''). Mandatory for identification. Correct.

B (Code): Option number (1-254), matching vendor spec (e.g., 66 for TFTP). Mandatory. Correct.

C (Type): Data type (e.g., string, IP), defining format. Mandatory. Correct.

D (Allowed Value(s)): Optional---constrains values (e.g., ''server1''), but not required for definition. Incorrect here.

Practical Example: In an INE lab, you'd define Option 66 (Name: ''TFTP,'' Code: 66, Type: string), apply it, and troubleshoot client uptake.

Answer : D

Comprehensive and Detailed In-Depth

DHCP Failover in NIOS ensures redundancy between two peers (primary and secondary). When one peer loses power, the state shifts to COMMUNICATIONS-INTERRUPTED, meaning the remaining peer continues serving DHCP but with limited capacity for new leases. Let's analyze:

Failover Mechanics: In NORMAL state, peers split the lease pool (e.g., 50/50 or custom split). In COMMUNICATIONS-INTERRUPTED, the surviving peer:

Renews leases for existing clients (using its synced database).

Assigns new leases from its portion of the pool, with reduced capacity (e.g., MCLT---Maximum Client Lead Time---limits new lease duration).

Scenario: Power is out for 1 hour, and new devices are joining. The remaining peer can handle renewals and has some new lease capacity (depending on pool size and MCLT, typically 1 hour by default).

Options:

A: Contacting support and forcing PARTNER-DOWN gives the surviving peer full pool access, but it's unnecessary for a 1-hour outage with 'a few' new clients. Overkill.

B: Increasing lease time (e.g., to 4 hours) prevents lease expiration but doesn't address new client capacity and requires manual reversion. Unneeded complexity.

C: Reconfiguring relays to point only to the surviving peer is redundant---it's already receiving requests---and risks misconfiguration. Incorrect.

D: Doing nothing leverages the failover design: existing clients renew seamlessly, and the remaining peer services new clients within its capacity. Correct for this short-term, low-impact scenario.

Practical Example: In an INE lab, you'd monitor the surviving peer's lease usage (via Grid Manager > DHCP > Leases) and confirm it handles the load, a key troubleshooting skill.

Answer : B, C, D

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.

Answer : C

Comprehensive and Detailed In-Depth

Infoblox NIOS implements DHCP Failover based on the IETF DHCP Failover protocol (draft standard), using TCP port 647 by 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 requires guaranteed 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.

Answer : B

Comprehensive and Detailed In-Depth

Infoblox NIOS provides a Command Line Interface (CLI) for diagnostics, accessible via multiple methods, not solely the serial port:

Serial Console: Connecting a serial cable (9600 baud) to the appliance's serial port grants CLI access, useful for physical troubleshooting or when network access is down. It provides full diagnostic commands (e.g., 'show process,' 'set debug').

SSH: Remote access via SSH (default port 22) to the appliance's management IP offers the same CLI, assuming network connectivity and credentials are available. This is equally comprehensive.

Key Point: Both methods provide access to all diagnostic commands (e.g., 'show log,' 'reset database'), debunking the 'only way' claim. The serial port is just one option, often used in failure scenarios (e.g., network outage), but SSH is more common day-to-day.

INE Context: The course covers CLI troubleshooting, emphasizing both serial and SSH access for Grid diagnostics, making this a practical distinction.

Why False: The statement's exclusivity is incorrect---multiple access methods exist.