RAID, which stands for Redundant Array of Independent Disks, is a technology that combines multiple physical hard drives into a single logical unit to improve data reliability and performance. There are different RAID levels commonly used:
1. RAID 0 (Striping):
– Description: Splits data evenly across multiple disks for improved performance but no redundancy.
– Use cases: Often used in environments where performance is crucial but data redundancy is not a concern.

2. RAID 1 (Mirroring):
– Description: Duplicates data across multiple disks for data redundancy.
– Use cases: Used in environments where data reliability is critical.
3. RAID 5 (Striping with Parity):
Description: Distributes data and parity information across multiple disks for a balance of performance and data protection.
– Use cases: Commonly used in file and application servers.
4. RAID 6 (Striping with Double Parity):
– Description: Extends RAID 5 by using two parity blocks for increased fault tolerance.
– Use cases: Used in environments where high data availability and fault tolerance are critical.

5. RAID 10 (RAID 1+0 or Mirrored Striping):
– Description: Combines mirroring and striping for both redundancy and improved performance.
– Use cases: Ideal for environments that require both high performance and high fault tolerance.

There are several Common Cyber Attacks. They are:

1. Phishing: Trickery to gain sensitive information such as passwords or credit card numbers by pretending to be a legitimate entity. 
2. Malware: Malicious software designed to disrupt, damage, or gain unauthorized access to computer systems. 
3. DoS: Overloading a system with excessive traffic rendering it incapable of serving legitimate users. 
4. MitM: Intercepting and manipulating communication between entities allows attackers to eavesdrop on the data.
5. SQL Injection: Exploiting web app vulnerabilities to execute harmful SQL statements, leading to unauthorized database access. 
6. XSS: Injecting malicious scripts into web pages viewed by other users, used to steal session cookies or sensitive information.
7. Zero-Day Exploit: Exploiting unknown software vulnerabilities leaving no chance for the developers to patch.
8. Password Attacks: Guessing or obtaining passwords through various tactics, including brute force, and social engineering. 
9. Drive-by Downloads: Malicious software downloads without user consent, by visiting a compromised website. 
10. DNS Spoofing: Redirecting DNS queries to malicious sites often to snatch sensitive data. 
11. Social Engineering: Psychological manipulation of individuals to obtain confidential information.
12. Botnets: Networks of compromised computers controlled remotely to perform distributed attacks, send spam, or commit fraud.