Shah Notes

RAID (Redundant Array of Independent Disks) is a storage technology that combines multiple disk drives to improve performance, reliability, and capacity. Here's a concise overview of RAID levels 1 to 10: RAID 1 (Mirroring): Uses two or more drives to create an exact copy of data Excellent read performance and fault tolerance 50% storage efficiency RAID 2: Rarely used in practice Stripes data at the bit level with Hamming code error correction Requires many disks, making it impractical RAID 3: Byte-level striping across multiple drives Uses a dedicated parity drive Good for large, sequential data transfers RAID 4: Block-level striping with a dedicated parity drive Better for small, random read operations than RAID 3 RAID 5: Stripes data and parity across all drives Good balance of performance, efficiency, and fault tolerance Can survive one drive failure RAID 6: Similar to RAID 5, but with double parity Can survive two simultaneous drive failures Better data protection than RAID 5, ...

  Difference between AI, ML and Neural network Difference Between AI, ML, and Neural Networks Artificial Intelligence (AI), Machine Learning (ML), and Neural Networks are interconnected yet distinct concepts that play crucial roles in the domain of intelligent computing. Below is a detailed breakdown of their differences across various dimensions. 1. Definitions Artificial Intelligence (AI): AI is a broad field in computer science aimed at creating systems that can perform tasks requiring human intelligence, such as reasoning, problem-solving, perception, and decision-making. Machine Learning (ML): ML is a subset of AI that focuses on algorithms and statistical models enabling systems to learn and improve from experience without being explicitly programmed. Neural Networks: Neural networks are a specific set of algorithms within ML inspired by the structure and functioning of the human brain. They consist of layers of interconnected nodes (neurons) designed for tasks like ...

 OSI (Open system interconnect) and TCP/IP (Transmission Control Protocol/Internet Protocol) 1. Explain OSI Layer?   ▪ Open system interconnect (OSI) was developed by the international organization for standardization (ISO) and introduced in 1984.  ▪ It’s a consists of seven layers  ▪ Application layer, Presentation layer, Session layer, Transport layer, Network layer, Data link layer, Physical layer.  2.Which Layer is Responsible for Reliable Connection?  The transport layer guarantees a reliable end-to-end connection    3.What are Different protocol works at each of the Layer in OSI model?  Application layer  It’s responsible for providing an interface for the user to interact with application services or network services. Ex-Web browser (HTTP), Telnet  Presentation layer  It’s responsible for defining a standard format to the data. The major functions described at this layer are: - Encoding-Decoding Ex- AVI-(video), ...

  The world of Hacking Introduction   Hacking' is a word which the world thinks illegitimate. However, that is not true. A person who hacks doesn't necessarily have to be a thief. As long as it is harmless, hacking is fun. Many multi-national companies (MNC) hire professional hackers, however, it is important to keep it ethical and not give in to the darker side of hacking. People also have the wrong impression that hacking is only meant for highly skilled computer geniuses known as coders. Hacking isn't limited to techies but also can be done by anyone who wishes to protect their information from others. Hacking is fine if you're looking to quench your curiosity. The person, who secures data, be it from an organization or a mere personal computer is also a hacker. Many companies recruit hackers to their official team for safeguarding their data and enhancing their security. As surprising as it is, one can make a good career with hacking. Hackers can also freelance as a...

Cloud Security Introduction  Every company is storing data on the cloud for backup and other reasons. Businesses invest a significant amount of money in developing and installing software to help them run more efficiently. Cloud computing allows businesses to access software as a service via the internet. Cloud computing is a safe method of storing and sharing data. One of the most effective strategies to improve team performance is to use cloud computing. Switching your company's computing needs from on-premises hardware to the cloud is the first step toward future success. The cloud allows you to access additional applications, enhances data accessibility, improves team collaboration, and simplifies content administration.  Companies require a safe method of gaining fast access to your data. Cloud security ensures that authorized users have access to your data and apps. Also, have a dependable method of accessing your cloud applications and information at all times, allo...