Infoblox NIOS-DDI-Expert Practice Exams
Last updated on Oct 21,2026- Exam Code: NIOS-DDI-Expert
- Exam Name: Infoblox Qualified NIOS DDI Expert - INE
- Certification Provider: Infoblox
- Latest update: Oct 21,2026
Question #21
Which system provides database synchronization to the passive node of an HA pair Grid Member?
- A . The Active Node of the HA pair
- B . The Grid Master
- C . The DNS Primary
- D . The Grid Master Candidate
Correct Answer: A
A
Explanation:
Comprehensive and Detailed In-Depth
In an Infoblox High Availability (HA) pair, the active node maintains the live database and services (DNS, DHCP, etc.), while the passive node remains on standby, ready to take over if needed. Database synchronization between the active and passive nodes is handled directly by the active node using the bloxSync mechanism over a secure connection (typically SSL). The Grid Master oversees Grid-wide synchronization, but within an HA pair, the active node is responsible for keeping the passive node’s database up-to-date. The Grid Master Candidate (GMC) and DNS Primary are unrelated to this specific HA pair sync process. This is a key troubleshooting point in the INE course.
Reference: Infoblox NIOS Documentation C HA Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.
A
Explanation:
Comprehensive and Detailed In-Depth
In an Infoblox High Availability (HA) pair, the active node maintains the live database and services (DNS, DHCP, etc.), while the passive node remains on standby, ready to take over if needed. Database synchronization between the active and passive nodes is handled directly by the active node using the bloxSync mechanism over a secure connection (typically SSL). The Grid Master oversees Grid-wide synchronization, but within an HA pair, the active node is responsible for keeping the passive node’s database up-to-date. The Grid Master Candidate (GMC) and DNS Primary are unrelated to this specific HA pair sync process. This is a key troubleshooting point in the INE course.
Reference: Infoblox NIOS Documentation C HA Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.
Question #22
What sends the email messages for Workflow Approval notifications in NIOS?
- A . NIOS Grid Master (GM)
- B . NIOS Grid Master Candidate (GMC)
- C . NIOS Grid Master (GM) and the NIOS Grid Master Candidate (GMC)
- D . NIOS SuperAdmin
Correct Answer: A
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 C Workflow Notifications; INE Course Objective: NIOS DDI Grid Deployment.
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 C Workflow Notifications; INE Course Objective: NIOS DDI Grid Deployment.
Question #23
Which of the following statements are true about NIOS CSV import? (Select all that apply.)
- A . You must use the Data Import Wizard (DIW) to leverage CSV import
- B . The CSV format is NIOS version-specific
- C . Not all fields of the CSV file are required. The mandatory fields are denoted by the * symbol
- D . You must use NIOS WAPI to leverage CSV import
Correct Answer: A, C
A, C
Explanation:
Comprehensive and Detailed In-Depth
CSV import in NIOS allows bulk management of objects (e.g., DNS records, networks) via structured files. Let’s evaluate each statement:
A: The Data Import Wizard (DIW) in Grid Manager (Data Management > Import) is the primary GUI tool for CSV imports, guiding admins through file upload, format selection, and validation. While WAPI can also handle CSV, DIW is the standard method, making this true in the GUI context emphasized in INE. Correct.
B: The CSV format adheres to a standard Infoblox structure (e.g., headers like "fqdn,ip_address"), but it’s not strictly version-specific―core fields remain consistent across NIOS versions, though new features might add optional fields. Incorrect.
C: In a CSV file, mandatory fields (e.g., "fqdn" for a host record) are marked with an asterisk (*) in the
CSV template or documentation, while others (e.g., "comment") are optional. This flexibility is key for bulk operations. Correct.
D: WAPI supports CSV import via API calls, but it’s not required―DIW provides a GUI alternative. This makes the "must" phrasing false. Incorrect.
Practical Example: In an INE lab, you might use DIW to import a CSV with A records, ensuring only mandatory fields (marked *) are filled, troubleshooting any import errors via logs.
Reference: Infoblox NIOS Administrator Guide C CSV Import; INE Course Objective: NIOS DDI Grid Deployment.
A, C
Explanation:
Comprehensive and Detailed In-Depth
CSV import in NIOS allows bulk management of objects (e.g., DNS records, networks) via structured files. Let’s evaluate each statement:
A: The Data Import Wizard (DIW) in Grid Manager (Data Management > Import) is the primary GUI tool for CSV imports, guiding admins through file upload, format selection, and validation. While WAPI can also handle CSV, DIW is the standard method, making this true in the GUI context emphasized in INE. Correct.
B: The CSV format adheres to a standard Infoblox structure (e.g., headers like "fqdn,ip_address"), but it’s not strictly version-specific―core fields remain consistent across NIOS versions, though new features might add optional fields. Incorrect.
C: In a CSV file, mandatory fields (e.g., "fqdn" for a host record) are marked with an asterisk (*) in the
CSV template or documentation, while others (e.g., "comment") are optional. This flexibility is key for bulk operations. Correct.
D: WAPI supports CSV import via API calls, but it’s not required―DIW provides a GUI alternative. This makes the "must" phrasing false. Incorrect.
Practical Example: In an INE lab, you might use DIW to import a CSV with A records, ensuring only mandatory fields (marked *) are filled, troubleshooting any import errors via logs.
Reference: Infoblox NIOS Administrator Guide C CSV Import; INE Course Objective: NIOS DDI Grid Deployment.
Question #24
An administrator manages the zone example.com in an Infoblox Grid. The new domain marketing.example.com will have its own set of name servers that are not part of the same Infoblox Grid.
Which type of zone should the administrator configure in NIOS for marketing.example.com?
- A . Authoritative zone
- B . Delegated zone
- C . Subzone
- D . External zone
Correct Answer: B
B
Explanation:
Comprehensive and Detailed In-Depth
Configuring a subdomain like marketing.example.com in NIOS:
Scenario: example.com is authoritative on the Grid, but marketing.example.com uses external name servers (not Grid-managed).
B (Delegated Zone): A delegation zone adds NS records pointing to external servers (e.g., ns1.marketing.com), handing off resolution. Correct.
A: Authoritative means the Grid hosts the zone’s records―not true here. Incorrect.
C: Subzone isn’t a NIOS term―implies authoritative control, not delegation. Incorrect.
D: External zone isn’t a configuration option―confuses forward zones. Incorrect.
Practical Example: In an INE lab, you’d delegate marketing.example.com with NS records, test resolution, and troubleshoot DNS handoff.
Reference: Infoblox NIOS Administrator Guide C DNS Delegation; INE Course Content: NIOS DDI DNS Troubleshooting.
B
Explanation:
Comprehensive and Detailed In-Depth
Configuring a subdomain like marketing.example.com in NIOS:
Scenario: example.com is authoritative on the Grid, but marketing.example.com uses external name servers (not Grid-managed).
B (Delegated Zone): A delegation zone adds NS records pointing to external servers (e.g., ns1.marketing.com), handing off resolution. Correct.
A: Authoritative means the Grid hosts the zone’s records―not true here. Incorrect.
C: Subzone isn’t a NIOS term―implies authoritative control, not delegation. Incorrect.
D: External zone isn’t a configuration option―confuses forward zones. Incorrect.
Practical Example: In an INE lab, you’d delegate marketing.example.com with NS records, test resolution, and troubleshoot DNS handoff.
Reference: Infoblox NIOS Administrator Guide C DNS Delegation; INE Course Content: NIOS DDI DNS Troubleshooting.
Question #25
How can an administrator access the NIOS Online Documentation through the Grid Manager UI?
- A . From Administration > Logs > Toolbar > Download
- B . From Tools > Download Support bundle
- C . From Tools > Download Admin guide
- D . From Help > Documentation > NIOS Online Documentation
Correct Answer: D
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 C UI Navigation; INE Course Content: NIOS DDI Grid Troubleshooting.
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 C UI Navigation; INE Course Content: NIOS DDI Grid Troubleshooting.
Question #26
A Member in a DHCP Failover pair can assign addresses to new clients, when it is in which state(s)? (Select all that apply.)
- A . RECOVER DONE
- B . NORMAL
- C . COMMUNICATIONS-INTERRUPTED
- D . PARTNER-DOWN
Correct Answer: B, C, D
B, C, D
Explanation:
Comprehensive and Detailed In-Depth
DHCP Failover states determine lease assignment:
B (NORMAL): Both peers assign from their pools―full capacity for new clients. Correct.
C (COMMUNICATIONS-INTERRUPTED): Surviving peer assigns new leases within MCLT limits. Correct.
D (PARTNER-DOWN): Single peer takes full pool, assigns new leases freely. Correct.
A (RECOVER DONE): Post-recovery state before NORMAL―typically doesn’t assign until synced, but documentation varies. Likely incorrect here unless transitional.
Practical Example: In an INE lab, test each state, monitor new client IPs, and troubleshoot capacity limits.
Reference: Infoblox NIOS Administrator Guide C DHCP Failover States; INE Course Content: NIOS DDI DHCP Troubleshooting.
B, C, D
Explanation:
Comprehensive and Detailed In-Depth
DHCP Failover states determine lease assignment:
B (NORMAL): Both peers assign from their pools―full capacity for new clients. Correct.
C (COMMUNICATIONS-INTERRUPTED): Surviving peer assigns new leases within MCLT limits. Correct.
D (PARTNER-DOWN): Single peer takes full pool, assigns new leases freely. Correct.
A (RECOVER DONE): Post-recovery state before NORMAL―typically doesn’t assign until synced, but documentation varies. Likely incorrect here unless transitional.
Practical Example: In an INE lab, test each state, monitor new client IPs, and troubleshoot capacity limits.
Reference: Infoblox NIOS Administrator Guide C DHCP Failover States; INE Course Content: NIOS DDI DHCP Troubleshooting.
Question #27
Which types of Zone are available for Add Zone? (Select all that apply.)
- A . Authoritative Zone
- B . Forward Zone
- C . Primary Zone
- D . Delegation
Correct Answer: A, B, C, D
A, B, C, D
Explanation:
Comprehensive and Detailed In-Depth
In NIOS Grid Manager (Data Management > DNS > Add Zone), administrators can create various zone types to manage DNS resolution.
All listed options are valid:
A (Authoritative Zone): A zone where the Infoblox appliance is the authoritative source for DNS records (e.g., example.com with A, MX records). Correct.
B (Forward Zone): A zone configured to forward queries to external DNS servers (e.g., forwarding "internal.com" to a corporate DNS). Correct.
C (Primary Zone): Often synonymous with Authoritative Zone in Infoblox, it’s a master zone hosting original DNS data (distinct from secondary zones). Correct.
D (Delegation): A zone delegated to another name server (e.g., "sub.example.com" delegated to different NS records). Correct.
Clarification: In NIOS, "Authoritative" and "Primary" are sometimes used interchangeably, but both are options in the Add Zone wizard, alongside Forward and Delegation zones.
Practical Example: In an INE lab, you might add an Authoritative Zone for "lab.com," a Forward Zone for external lookups, and a Delegation for a subdomain, testing DNS troubleshooting across these types.
Reference: Infoblox NIOS Administrator Guide C DNS Zone Management; INE Course Content: NIOS DDI DNS Troubleshooting.
A, B, C, D
Explanation:
Comprehensive and Detailed In-Depth
In NIOS Grid Manager (Data Management > DNS > Add Zone), administrators can create various zone types to manage DNS resolution.
All listed options are valid:
A (Authoritative Zone): A zone where the Infoblox appliance is the authoritative source for DNS records (e.g., example.com with A, MX records). Correct.
B (Forward Zone): A zone configured to forward queries to external DNS servers (e.g., forwarding "internal.com" to a corporate DNS). Correct.
C (Primary Zone): Often synonymous with Authoritative Zone in Infoblox, it’s a master zone hosting original DNS data (distinct from secondary zones). Correct.
D (Delegation): A zone delegated to another name server (e.g., "sub.example.com" delegated to different NS records). Correct.
Clarification: In NIOS, "Authoritative" and "Primary" are sometimes used interchangeably, but both are options in the Add Zone wizard, alongside Forward and Delegation zones.
Practical Example: In an INE lab, you might add an Authoritative Zone for "lab.com," a Forward Zone for external lookups, and a Delegation for a subdomain, testing DNS troubleshooting across these types.
Reference: Infoblox NIOS Administrator Guide C DNS Zone Management; INE Course Content: NIOS DDI DNS Troubleshooting.
Question #28
What filters are available for Global Search Basic Mode? (Select all that apply.)
- A . DNS Name
- B . IP Address
- C . Record Type
- D . MAC Address
Correct Answer: A, B, C
A, B, C
Explanation:
Comprehensive and Detailed In-Depth
Global Search in NIOS (top-right search bar) offers Basic and Advanced modes:
Basic Mode Filters: Allows quick searches across Grid objects using:
DNS Name: Search by FQDN (e.g., "host.example.com"). Correct.
IP Address: Search by IPv4/IPv6 (e.g., "192.168.1.10"). Correct.
Record Type: Filter by DNS types (e.g., A, CNAME). Correct.
MAC Address: Available in Advanced mode (Data Management > Global Search > Advanced), not Basic mode, which focuses on DNS/IP basics. Incorrect here.
Usage: Enter a term (e.g., "example.com"), select a filter, and view results (e.g., all A records).
Practical Example: In an INE lab, you’d use Basic mode to find all A records for "lab.com," troubleshoot DNS issues, and switch to Advanced for MAC searches.
Reference: Infoblox NIOS Administrator Guide C Global Search; INE Course Content: NIOS DDI DNS Troubleshooting.
A, B, C
Explanation:
Comprehensive and Detailed In-Depth
Global Search in NIOS (top-right search bar) offers Basic and Advanced modes:
Basic Mode Filters: Allows quick searches across Grid objects using:
DNS Name: Search by FQDN (e.g., "host.example.com"). Correct.
IP Address: Search by IPv4/IPv6 (e.g., "192.168.1.10"). Correct.
Record Type: Filter by DNS types (e.g., A, CNAME). Correct.
MAC Address: Available in Advanced mode (Data Management > Global Search > Advanced), not Basic mode, which focuses on DNS/IP basics. Incorrect here.
Usage: Enter a term (e.g., "example.com"), select a filter, and view results (e.g., all A records).
Practical Example: In an INE lab, you’d use Basic mode to find all A records for "lab.com," troubleshoot DNS issues, and switch to Advanced for MAC searches.
Reference: Infoblox NIOS Administrator Guide C Global Search; INE Course Content: NIOS DDI DNS Troubleshooting.
Question #29
What does the CLI command "reset all" do?
- A . It erases the appliance back to factory default
- B . It erases the database, licenses, and network settings on the appliance
- C . It erases the database, network settings, and log files on the appliance
- D . This is not a valid CLI command
Correct Answer: D
D
Explanation:
Comprehensive and Detailed In-Depth
The NIOS CLI offers specific "reset" commands for appliance management, but "reset all" isn’t one of them. Let’s explore:
Valid Commands:
reset database: Clears the NIOS database (DNS, DHCP data) but keeps network settings and licenses.
reset all licenses: Resets licensing, requiring re-registration.
set factory: Performs a full factory reset, wiping everything (database, network, logs) to defaults.
"reset all": This isn’t documented or recognized in NIOS CLI. Typing it yields an error (e.g., "Invalid command").
Options Analysis:
A: Factory reset is set factory, not "reset all." Incorrect.
B/C: No single "reset all" command combines these actions―specific resets are separate. Incorrect.
D: Matches the lack of this command in NIOS. Correct.
Practical Example: In an INE lab, you’d use reset database to clear a test Grid member, but "reset all" would fail, teaching CLI precision in troubleshooting.
Reference: Infoblox NIOS CLI Reference Guide; INE Course Content: NIOS DDI Grid Troubleshooting.
D
Explanation:
Comprehensive and Detailed In-Depth
The NIOS CLI offers specific "reset" commands for appliance management, but "reset all" isn’t one of them. Let’s explore:
Valid Commands:
reset database: Clears the NIOS database (DNS, DHCP data) but keeps network settings and licenses.
reset all licenses: Resets licensing, requiring re-registration.
set factory: Performs a full factory reset, wiping everything (database, network, logs) to defaults.
"reset all": This isn’t documented or recognized in NIOS CLI. Typing it yields an error (e.g., "Invalid command").
Options Analysis:
A: Factory reset is set factory, not "reset all." Incorrect.
B/C: No single "reset all" command combines these actions―specific resets are separate. Incorrect.
D: Matches the lack of this command in NIOS. Correct.
Practical Example: In an INE lab, you’d use reset database to clear a test Grid member, but "reset all" would fail, teaching CLI precision in troubleshooting.
Reference: Infoblox NIOS CLI Reference Guide; INE Course Content: NIOS DDI Grid Troubleshooting.
Question #30
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
Correct Answer: C
C
Explanation:
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.
Reference: Infoblox NIOS Administrator Guide C DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.
C
Explanation:
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.
Reference: Infoblox NIOS Administrator Guide C DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.