ECC (Error-Correcting Code) RAM is commonly used in servers to provide error detection and correction, improving reliability in critical systems. It is designed to detect and correct single-bit errors, ensuring data integrity in environments where stability is paramount.
Option A (SODIMM): Incorrect. SODIMM is typically used in laptops, not servers.
Option B (Rambus): Incorrect. Rambus is an outdated RAM type and not commonly used today.
Option C (DDR3): Incorrect. While DDR3 is a type of RAM, it is not specific to servers and does not provide error correction.
References:
CompTIA A+ Core 1 Objectives: 3.2 (RAM types and their uses)

Comprehensive and Detailed Explanation From Exact Extract:
RAID 6 uses two parity blocks, allowing it to tolerate the failure of two drives without losing data.
Reference: CompTIA A+ Core 1 220-1201 Official Study Guide, Section: RAID TypesRAID 6 supports dual- drive failure tolerance with dual parity, making it more fault-tolerant than RAID 5.

CompTIA A+ teaches that RAID 6 is the RAID level that uses double parity, allowing the array to survive the failure of two drives simultaneously. RAID 6 stripes data across all disks like RAID 5 but stores two independent sets of parity information, making it far more fault-tolerant.
RAID 0 has no parity and provides only performance. RAID 1 mirrors data but uses no parity. RAID 5 uses single parity and can tolerate only one disk failure. Because the question explicitly asks for double parity, only RAID 6 is correct.

If users canaccess local network resourcesbut not theinternet, the most likely culprit is amisconfigured or missing default gateway. The default gateway routes traffic from the local network to external networks (i.e., the internet). If it's not properly set or was altered during a firewall update, internet traffic won't be forwarded correctly.
Option A:Static IPs could cause conflict, but wouldn't affect only external access if configured correctly.
Option C:An incorrect subnet mask could isolate devices, but local communication would likely be impacted too.
Option D:VLANs segment networks; while misconfigured VLANs could cause access issues, they'd more likely isolate local traffic as well.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 2.6: Given a scenario, configure and troubleshoot network connectivity.

CompTIA A+ teaches that S.M.A.R.T. warnings indicate imminent drive failure. Even if the RAID controller reports the array as "healthy," a S.M.A.R.T. alert means the drive should be replaced immediately.
RAID 5 provides redundancy for one drive failure, but technicians should replace the degrading drive before it fails fully, ensuring the rebuild happens proactively.
Running chkdsk affects file systems, not drive health. Disabling write caching is unrelated. Rebuilding the array should only occur after replacing the faulty drive.
Replacing the drive prevents a catastrophic dual-drive failure scenario, which RAID 5 cannot survive.
This approach aligns with CompTIA troubleshooting guidelines for RAID maintenance and S.M.A.R.T.
diagnostics.