oop and datacenter

Class

•  A blueprint for creating objects 

  • (e.g., Car class with attributes like color and speed).

object

•  An instance of a class

  • (e.g., a specific Car with color = red and speed = 100).

Inheritance

• Allows a class to inherit properties and methods from another clas

  • (e.g., ElectricCar inherits from Car).

Encapsulation

• Bundling data and methods together

  • Restricting access to some components to not be changed

Polymorphism

• Allows objects to be treated as instances of their parent class, while specific methods may behave differently based on the object's actual class

  • (e.g., a Car and Bike both have a start method, but they start differently).

Abstraction

•  Hiding complex implementation details and showing only the necessary parts to the user 

  • (e.g., you drive a car without needing to understand how the engine works).

Servers

Powerful computers that provide data or services to other devices over a network.

• They can be physical machines or virtual ones,

• where multiple virtual servers run on a single physical machine.

Networks

Systems that connect devices (like servers and computers) to share resources and information. Key parts include:

router

Directs data between different networks.

switch

Connects devices within the same network and sends data to the correct one.

Firewall

Manages and protects network traffic based on security rules.

Databases

Where data is stored and managed.

SQL Databases

• Organize data into tables with relationships, good for complex queries (e.g., MySQL, PostgreSQL).

NoSQL Databases:

• Handle unstructured data, more flexible, often used for big data or real-time applications (e.g., MongoDB).

Connectivity

 Understanding how servers, networks, and databases work together is crucial. For example, in a web application, the server runs the app, connects to a database to retrieve data, and uses a network to send that data to users.