매달, 우리는 1000명 이상의 사람들이 시험 준비를 잘하고 시험을 잘 통과할 수 있도록 도와줍니다.
Infoblox Qualified NIOS DDI Expert - INE 온라인 연습
최종 업데이트 시간: 2025년05월04일
당신은 온라인 연습 문제를 통해 Infoblox NIOS-DDI-Expert 시험지식에 대해 자신이 어떻게 알고 있는지 파악한 후 시험 참가 신청 여부를 결정할 수 있다.
시험을 100% 합격하고 시험 준비 시간을 35% 절약하기를 바라며 NIOS-DDI-Expert 덤프 (최신 실제 시험 문제)를 사용 선택하여 현재 최신 80개의 시험 문제와 답을 포함하십시오.
정답:
Explanation:
Comprehensive and Detailed In-Depth
During a NIOS software upgrade (Grid > Upgrade), the Grid enters a sensitive state where certain actions risk instability.
Let’s evaluate:
Upgrade Phases: Upload, Distribute, Test, Upgrade. Members reboot and sync, requiring database consistency.
Options:
A: Updating DNS views modifies the database, which could conflict with the upgrade’s database sync or cause service interruptions. Unsafe.
B: Changing DHCP properties (e.g., ranges) alters live configurations, risking lease sync issues during member reboots. Unsafe.
C: Setting the time zone (Grid > Members > Edit > Basic) is a non-service-affecting change, stored locally and applied post-reboot. Safe during upgrades, as it doesn’t impact DNS/DHCP/Grid data. Correct.
D: Incorrect, as C is a viable safe action.
Practical Example: In an INE lab, you’d adjust a member’s time zone during an upgrade to align logs, troubleshooting without disrupting the process.
Reference: Infoblox NIOS Administrator Guide C Upgrade Best Practices; INE Course Content: NIOS DDI Grid Deployment.
정답:
Explanation:
Comprehensive and Detailed In-Depth
NIOS uses a granular permission model for admin groups/roles (Administration > Administrators).
Here’s what applies:
A (Global Permissions): Broad privileges across all objects (e.g., "All DNS Zones" read/write). Applies to groups/roles for universal access. Correct.
B (Object Permissions): Specific to individual objects (e.g., read-only on "zone1.example.com"). Assignable to groups/roles for fine control. Correct.
C (Grid Permissions): Control Grid-wide settings (e.g., backup, upgrade permissions). Assignable to groups/roles, distinct from member-specific rights. Correct.
D (Member Permissions): Permissions are tied to Grid members (e.g., restart services on "Member1"), but NIOS documentation classifies these under object or Grid permissions, not a separate "Member" category. Incorrect in this context.
Setup: In Grid Manager, you assign these via group/role properties, selecting scopes (global, object-specific, Grid-level).
Practical Example: In an INE lab, you’d assign a group global DNS write access and Grid backup rights, testing restricted troubleshooting scenarios.
Reference: Infoblox NIOS Administrator Guide C Permissions; INE Course Objective: NIOS DDI Grid Deployment.
정답:
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.
정답:
Explanation:
Comprehensive and Detailed In-Depth
VRRP governs HA failover in NIOS, using priority values (0-255) to determine the active node. Here’s the detailed process:
Normal Operation: The active node has a higher priority (e.g., 100) than the passive node (e.g., 90), set during HA configuration.
Force Failover: In Grid Manager (Grid > Members > Force Failover), the admin triggers a manual switch. The active node sends a VRRP advertisement with priority 255 to assert itself as the master, then lowers its priority (e.g., to 90), allowing the passive node (now higher, e.g., 100) to take over.
Why 255: Per VRRP standards (RFC 3768), 255 is the highest priority, reserved for the master to signal ownership or force transitions. Post-failover, priorities revert to configured values.
Options:
A (0): Signals a node is shutting down, not forcing failover. Incorrect.
C (1024): Exceeds VRRP’s 8-bit range (0-255). Invalid.
D (128): A possible priority, but not the forced failover value. Incorrect.
Practical Example: In an INE lab, you’d force failover, capture VRRP packets (e.g., with Wireshark), and verify the 255 priority, troubleshooting HA behavior.
Reference: Infoblox NIOS Administrator Guide C HA Failover; RFC 3768 (VRRP); INE Course Content:
NIOS DDI Grid Troubleshooting.
정답:
Explanation:
Comprehensive and Detailed In-Depth
In NIOS, a superuser is an admin with unrestricted permissions across the Grid, including user management.
Here’s the breakdown:
Superuser Role: Defined in Grid Manager (Administration > Administrators), superusers have full read/write access to all objects and settings, including admin accounts.
Password Change: A superuser can navigate to Administration > Administrators, select another admin account (e.g., "user1"), and modify its password, overriding any restrictions on that account.
Why True: This is a built-in capability to ensure ultimate control, useful for scenarios like account recovery or security enforcement. No restrictions apply to superusers for this action.
Practical Example: In an INE troubleshooting lab, a superuser might reset a locked-out admin’s password to regain Grid access, testing authentication policies.
Contrast: Regular admins with limited permissions can’t modify others’ accounts unless explicitly granted.
Reference: Infoblox NIOS Administrator Guide C Admin Management; INE Course Objective: NIOS DDI Grid Deployment.
정답:
Explanation:
Comprehensive and Detailed In-Depth
NIOS Grid Backup allows scheduled exports of the configuration database (DNS, DHCP, Grid settings)
to an external server.
Supported protocols ensure flexibility and security:
A (SFTP): Secure File Transfer Protocol (SSH-based) is supported for encrypted backups to remote servers (port 22). Widely used for secure transfers. Correct.
B (SCP): Secure Copy Protocol (also SSH-based) is supported, offering a simple, secure file transfer option (port 22). Correct.
C (FTP): File Transfer Protocol (unencrypted, port 21) is supported for legacy systems, though less secure. Correct.
D (HTTPS): Web-based secure transfer (port 443) is supported, allowing backups to HTTP servers with SSL/TLS encryption. Correct.
Setup: In Grid Manager (Grid > Grid Manager > Backup), you configure the protocol, server IP, and credentials.
Practical Example: In an INE lab, you’d schedule a backup using SFTP to a remote server, test restoration, and troubleshoot connectivity issues, reinforcing Grid deployment skills.
Note: All four are explicitly supported per NIOS documentation, making this a comprehensive list.
Reference: Infoblox NIOS Administrator Guide C Grid Backup; INE Course Objective: NIOS DDI Grid Deployment.
정답:
Explanation:
Comprehensive and Detailed In-Depth
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.
Reference: Infoblox NIOS Administrator Guide C Software Revert; INE Course Content: NIOS DDI Grid Troubleshooting.
정답:
Explanation:
Comprehensive and Detailed In-Depth
Obtaining new NIOS software releases follows a standardized process tied to Infoblox’s support infrastructure:
Official Method: New releases (e.g., NIOS 8.6.x) are available for download from the Infoblox Support Portal (https://support.infoblox.com) under the "Downloads" section. Admins log in with valid credentials, select the appliance model, and download the .upgrade file.
Options Analysis:
A: "Grid > Software > Download" isn’t a valid path in Grid Manager. The UI supports uploading and distributing releases (Grid > Upgrade), but not direct downloading. Incorrect.
B: Technical Support can assist with issues or provide files in rare cases (e.g., beta releases), but it’s not the standard method―self-service via the portal is preferred. Incorrect.
C: Account Managers handle sales, not software distribution. "Support Bundle" is also a misnomer― it’s for diagnostics, not upgrades. Incorrect.
D: The support portal is the documented, primary source for NIOS releases, aligning with INE’s focus on Grid upgrade procedures. Correct.
Steps: Download the file, upload it via Grid Manager (Grid > Upgrade > Upload), and initiate the upgrade process.
Practical Example: In an INE lab, you’d download NIOS 8.6.2 from the portal, upload it, and test a Grid-wide upgrade, troubleshooting any distribution failures.
Reference: Infoblox NIOS Administrator Guide C Obtaining Software Releases; INE Course Content:
NIOS DDI Grid Deployment.
정답:
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 C Software Upgrades; INE Course Objective: NIOS DDI Grid Deployment.
정답:
Explanation:
Comprehensive and Detailed In-Depth
Connecting to an Infoblox appliance’s serial port for CLI access requires specific hardware compatibility, not just any serial cable. Here’s why:
Serial Port Specs: Infoblox appliances use a standard DB9 serial port with a default baud rate of 9600 bps, 8 data bits, no parity, 1 stop bit (8N1). The cable must match this configuration and the appliance’s pinout (typically RS-232 standard).
Cable Types:
A straight-through serial cable won’t work―it’s for connecting dissimilar devices (e.g., DTE to DCE).
A null modem cable (with crossed transmit/receive pins) is required to connect a computer (DTE) to the appliance (DTE), ensuring proper signal flow.
Practical Issue: Using an incompatible cable (e.g., lacking null modem crossover or incorrect connectors like RJ45) results in no communication, a common troubleshooting pitfall.
INE Context: The course’s troubleshooting labs emphasize correct serial access for diagnosing network-down scenarios, highlighting this specificity.
Why False: Not all serial cables are null modem cables, and connector compatibility (e.g., DB9 vs.
USB adapters) matters. Thus, "any serial cable" is incorrect.
Example: In an INE lab, you’d use a DB9 null modem cable with a terminal emulator (e.g., PuTTY) set
to 9600 bps to access CLI logs after a Grid member failure.
Reference: Infoblox NIOS Administrator Guide C Serial Console Access; INE Course Content: NIOS DDI Grid Troubleshooting.
정답:
Explanation:
Comprehensive and Detailed In-Depth
Extensible Attributes (EAs) enhance NIOS object metadata, and the "Default Value" option sets a predefined value automatically applied when the EA is assigned to an object (unless overridden).
Purpose: It simplifies configuration by pre-populating common values, reducing manual entry.
Scenario: For an EA like "Department," setting a default value of "IT" ensures new networks inherit this unless specified otherwise (e.g., "HR").
Options:
A: Allowable ranges (e.g., 1-100) are set via EA type (Integer) and constraints, not default values. Incorrect.
B: Numeric values with ranges relate to validation, not defaults. Incorrect.
C: Assigning a predefined value (e.g., "Enabled" for "Status") is the exact use case for defaults. Correct.
D: Unique values per object contradict defaults, which apply uniformly unless changed. Incorrect.
Practical Example: In an INE Grid deployment lab, you’d set a default EA "Region: US" for new members, streamlining setup and troubleshooting consistency.
Reference: Infoblox NIOS Administrator Guide C Extensible Attributes; INE Course Objective: NIOS DDI Grid Deployment.
정답:
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 C CSV Export/Import; INE Course Objective: NIOS DDI Grid Deployment.
정답:
Explanation:
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.
Reference: Infoblox NIOS Administrator Guide C DHCP Failover; INE Course Content: NIOS DDI DHCP Troubleshooting.
정답:
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.
정답:
Explanation:
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.
Reference: Infoblox NIOS Administrator Guide C CLI Access; INE Course Content: NIOS DDI Grid Troubleshooting.