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Infoblox NIOS-DDI-Expert Exam
Infoblox Qualified NIOS DDI Expert - INE (Page 3 )

Updated On: 7-Feb-2026
Page 3 of 17
PDF with 80 Questions

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?

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

Answer(s): C

Explanation:

Comprehensive and Detailed In-Depth

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.


Reference:

Infoblox NIOS Administrator Guide ­ DHCP Option Filters; INE Course Content: NIOS DDI DHCP Troubleshooting.



Which syslogs can be used to view boot-up messages from the last reboot of an Infoblox appliance? Choose 3 answers

  1. Syslog via the remote console
  2. Syslog that has been redirected to an external syslog server
  3. Syslog via the serial console
  4. Syslog via the NIOS GUI

Answer(s): A,B,C

Explanation:

Comprehensive and Detailed In-Depth

Boot-up messages from an Infoblox appliance are logged in the syslog, which records system events like reboots. These logs can be accessed in multiple ways:

A (Remote Console): SSH or remote console access (e.g., via "show log syslog" CLI command) shows syslog entries, including boot messages.

B (External Syslog Server): If configured, NIOS redirects syslog to an external server, preserving boot messages for review.

C (Serial Console): Direct serial connection during boot captures real-time syslog output, including startup messages.

D (NIOS GUI): The GUI provides a syslog viewer (Grid > Grid Manager > Logs), but it's not designed for real-time boot message capture and may not show full historical detail unless explicitly exported. The INE course emphasizes troubleshooting via logs, including these methods.


Reference:

Infoblox NIOS Administrator Guide ­ Logging; INE Course Content: NIOS DDI Grid Troubleshooting.



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

  1. SSL VPN from the Active node
  2. SSL VPN from the Grid Master
  3. bloxSync from the Active node
  4. bloxSync from the Grid Master

Answer(s): C

Explanation:

Comprehensive and Detailed In-Depth

In an HA pair, the passive node stays synchronized with the active node to ensure seamless failover. This synchronization uses bloxSync, 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. The active 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.


Reference:

Infoblox NIOS Documentation ­ HA Pair Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.



An Infoblox Grid is using remote authentication for a group named Infoblox-Admins.
Where are the permissions for the accounts in Infoblox-Admins defined?

  1. Individual user accounts on the external server
  2. Group definitions on the external server
  3. Group permissions on the Grid
  4. Individual user accounts on the Grid

Answer(s): C

Explanation:

Comprehensive and Detailed In-Depth

When NIOS uses remote authentication (e.g., RADIUS, LDAP, or Active Directory), user authentication is handled by the external server, but permissions are defined within the NIOS Grid. For a group like "Infoblox-Admins," the external server verifies user credentials and group membership, but the Grid Manager assigns permissions (e.g., read/write access to DNS zones) to the group itself. This centralizes access control within NIOS, ensuring consistency across the Grid. Options A and B are incorrect because the external server manages authentication, not NIOS-specific permissions. Option D is wrong as permissions are group-based, not individually assigned on the Grid. The INE course covers Grid administration, including authentication setup.


Reference:

Infoblox NIOS Administrator Guide ­ Authentication; INE Course Objective: NIOS DDI Grid Deployment.



What protocol and port does DHCP Failover use to keep lease information synchronized between two peers?

  1. Default is TCP 1194, can be user configured
  2. Default is UDP 1194, can be user configured
  3. Default is TCP 647, can be user configured
  4. Default is UDP 647, can be user configured

Answer(s): 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 ­ DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.






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