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질문 # 26
An administrator defined several Upgrade Groups before updating the software on a Grid. What members must be put in the same Upgrade Group?
정답：B
설명：
Comprehensive and Detailed In-Depth Explanation: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.
References:Infoblox NIOS Administrator Guide - Software Upgrades; INE Course Objective: NIOS DDI Grid Deployment.
질문 # 27
How does the passive member of a High Availability (HA) pair receive its database updates?
정답：A
설명：
Comprehensive and Detailed In-Depth Explanation:In an HA pair, the passive node stays synchronized with the active node to ensure seamless failover. This synchronization usesbloxSync, 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. Theactive 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.
References:Infoblox NIOS Documentation - HA Pair Configuration; INE Course Content: NIOS DDI Grid Troubleshooting.
질문 # 28
Which CSV export format is recommended for tasks that involve data manipulation and reimporting to the NIOS Grid?
정답：B
설명：
Comprehensive and Detailed In-Depth Explanation: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.References:Infoblox NIOS Administrator Guide - CSV Export/Import; INE Course Objective: NIOS DDI Grid Deployment.
질문 # 29
Revert allows an administrator to swap the Infoblox software to the previously installed version of code, while retaining the current DNS, DHCP, and Grid configuration information.
정답：B
설명：
Comprehensive and Detailed In-Depth Explanation: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.References:Infoblox NIOS Administrator Guide - Software Revert; INE Course Content: NIOS DDI Grid Troubleshooting.
질문 # 30
Which of the following transport protocols are supported by scheduled NIOS Grid Backup? (Select all that apply.)
정답：A,B,C,D
설명：
Comprehensive and Detailed In-Depth Explanation: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.
References:Infoblox NIOS Administrator Guide - Grid Backup; INE Course Objective: NIOS DDI Grid Deployment.
질문 # 31
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