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To debug possible database issues on an Infoblox appliance, which file should an administrator review?
Comprehensive and Detailed In-Depth
Debugging database issues (e.g., sync failures, corruption) requires detailed logs specific to NIOS operations. Here's the breakdown:
A (messages file in support bundle): The 'messages' file contains general system logs (e.g., kernel events), not NIOS-specific database activity. It's less relevant here. Incorrect.
B (infoblox.log via GUI): The GUI allows downloading logs (Grid > Logs > Download), but these are often filtered or summarized, not the raw, comprehensive database logs needed for deep debugging. Incorrect.
C (infoblox.log in support bundle): The 'infoblox.log' in a support bundle (generated via CLI or GUI: Grid > Support Bundle) is the primary NIOS application log, capturing detailed database events (e.g., bloxSync errors, transaction failures). This is the go-to file for database troubleshooting, as emphasized in INE labs. Correct.
D (messages via GUI): Similar to A, this is a general system log, not NIOS-specific, and lacks database granularity. Incorrect.
Practical Example: In an INE troubleshooting scenario, you'd download a support bundle after a Grid sync failure, extract 'infoblox.log,' and search for database error codes to diagnose the issue.
How many IP addresses are required to configure a High Availability (HA) pair?
Comprehensive and Detailed In-Depth
An HA pair in NIOS requires:
1. Virtual IP (VIP): Shared address for services (e.g., 192.168.1.100).
2. Active Node IP: Physical address (e.g., 192.168.1.101).
3. Passive Node IP: Physical address (e.g., 192.168.1.102).
Total: 3 IPs.
Options:
A: 2 IPs insufficient---misses individual node IPs. Incorrect.
B: 3 IPs match HA design (VIP + 2 nodes). Correct.
C/D: Extra IPs (e.g., MGMT) are optional, not required. Incorrect.
Practical Example: In an INE lab, configure VIP 10.0.0.1, active 10.0.0.2, passive 10.0.0.3, test failover, and troubleshoot VRRP.
The Infoblox WAPI/RESTful API requires the administrator to use the Perl programming language.
Comprehensive and Detailed In-Depth
The Infoblox Web API (WAPI) is a RESTful API that allows administrators to interact with the NIOS system programmatically for tasks like managing DNS records, DHCP leases, and Grid configurations. Contrary to requiring Perl, WAPI is language-agnostic---it uses HTTP-based requests (GET, POST, PUT, DELETE) and returns data in JSON format. While Infoblox provides sample scripts in Perl (and historically supported a Perl API), administrators can use any programming language (e.g., Python, Java, or even tools like cURL) that supports HTTP requests. The misconception might stem from older documentation emphasizing Perl examples, but the INE course, focusing on advanced NIOS management, clarifies that WAPI is not tied to Perl.
Which stage of a NIOS upgrade is generally expected to take the shortest time?
Comprehensive and Detailed In-Depth
NIOS upgrade stages (Grid > Upgrade):
A (Upload): Uploading the .upgrade file (e.g., 50-200 MB) to the GM is quick---seconds to minutes, depending on network speed. Shortest. Correct.
B (Test): Validates file integrity/compatibility---fast but longer than upload (e.g., 1-2 minutes). Incorrect.
C (Distribute): Sending the file to all members takes longer, proportional to Grid size/network (e.g., 5-15 minutes). Incorrect.
D (Upgrade): Rebooting and applying the update per member is the longest (e.g., 10-30 minutes total). Incorrect.
Practical Example: In an INE lab, upload takes 30s, while distribution and upgrade take 10+ minutes, testing Grid deployment timing.
What does the Stealth option do on a name server for a DNS Zone?
Comprehensive and Detailed In-Depth
Stealth option in NIOS DNS (Data Management > DNS > Zone > Name Servers):
A: ''Stealth'' hides the server from NS records in the zone file, making it authoritative but unlisted---useful for internal servers. Correct.
B: Zone transfers are controlled by ACLs, not Stealth. Incorrect.
C: Caching is unrelated---Stealth affects visibility, not function. Incorrect.
D: Response behavior isn't altered---still answers queries. Incorrect.
Practical Example: In an INE lab, set a stealth NS, verify NS record absence, and troubleshoot external visibility.
