What is a Firewall?

Cloud computing is the delivery of computing services, such as storage, processing power, and applications, over the internet. This eliminates the need for local servers or personal devices. For example, services like Google Drive and Dropbox store files in the cloud, allowing users to access them from anywhere.

An algorithm is a step-by-step procedure for solving a specific problem or completing a task. It is used in computer programming to perform calculations, process data, and automate tasks. For example, a sorting algorithm such as QuickSort arranges a list of numbers in ascending order efficiently.

A compiler is a program that translates source code written in a high-level programming language (such as C++ or Java) into machine code that a computer can execute. For example, the GNU C Compiler (GCC) compiles C code into executable machine instructions that the CPU can understand.

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predefined security rules. Its main purpose is to protect the network from unauthorized access. For example, a firewall can block suspicious traffic coming from the internet to protect your computer from malware.

A database is an organized collection of structured data stored electronically. Databases allow for efficient storage, retrieval, and management of data. For example, a customer relationship management (CRM) system stores information about customers, allowing businesses to track interactions and analyze customer behavior.