Question 54 of 144
SK0-005 server-administration Practice Question
A server administrator is tasked with ensuring that a critical database server remains available in the event of a hardware failure. The solution must provide automatic failover with minimal administrative overhead. Which of the following should be implemented?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Server clustering
Server clustering provides automatic failover between nodes, ensuring high availability with minimal administrative overhead. RAID 1 offers disk redundancy but not server-level failover. Load balancing distributes traffic but does not automatically redirect if a server fails. Scheduled backups restore data after a failure but do not prevent downtime.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Load balancing
Why it's wrong here
Load balancing distributes network traffic across multiple servers but does not automatically fail over if a server goes down; it may route traffic to a failed server if health checks are not configured.
- ✗
Scheduled backups
Why it's wrong here
Scheduled backups protect data but do not ensure application availability; recovery from backup typically incurs significant downtime.
- ✗
RAID 1 mirroring
Why it's wrong here
RAID 1 provides disk redundancy but does not automatically fail over the server itself; manual intervention would be required to bring the backup server online.
- ✓
Server clustering
Why this is correct
Server clustering ties multiple servers together to act as a single system; if one node fails, another takes over automatically, providing high availability with minimal administrative effort.
Quick reference
RAID Level Comparison
| RAID Level | Min Disks | Fault Tolerance | Read | Write | Usable Capacity |
|---|---|---|---|---|---|
| RAID 0 | 2 | None | Excellent | Excellent | 100% |
| RAID 1 | 2 | 1 disk | Good | Moderate | 50% |
| RAID 5 | 3 | 1 disk | Good | Moderate | 67–94% |
| RAID 6 | 4 | 2 disks | Good | Lower | 50–88% |
| RAID 10 | 4 | 1 disk per mirror | Excellent | Good | 50% |
RAID is not a backup strategy — it protects against disk failure but not against accidental deletion, ransomware, or site-level events.
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Last reviewed: Jul 26, 2026
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