Ehsan Ul Haq
Ehsan Ul Haq is the Editor-in-Chief of theCoreiTech. Ehsan leads the editorial review process and checks the Computer Basics, Computer Hardware, and Computer Networking guides for accuracy, sourcing, and clarity before publication.
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Computer Basics
Servers vs Personal Computers: 8 Technical Differences Explained
Servers and personal computers share the same architecture but differ in reliability, scalability, and design. This guide explains 8 precise…
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Computer Basics
The Binary Number System Explained: How Computers Use 0s and 1s
The binary number system uses only 0 and 1 to represent all data in a computer. This guide explains how…
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Computer Basics
Bits, Bytes, KB, MB, GB, TB: Data Units Explained
A bit is the smallest unit of data in a computer. This guide explains bits, bytes, kilobytes, megabytes, gigabytes, terabytes,…
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Computer Basics
Binary vs Hexadecimal vs Decimal: Number System Comparison
Binary, hexadecimal, and decimal are 3 number systems used in computing. This guide defines all 3, shows conversion methods between…
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Computer Basics
File Types and Extensions: What They Are and How Computers Use Them
A file type defines the format and structure of a file's data. A file extension is the suffix that identifies…
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Computer Basics
ASCII vs Unicode: Character Encoding Standards Explained
ASCII and Unicode are character encoding standards that map characters to numeric values. This guide defines both, explains UTF-8 and…
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Computer Basics
What is an Operating System? Definition, Functions, and Types
An operating system is system software that manages hardware and provides services for application programs. This guide covers OS functions,…
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Computer Basics
GUI vs CLI: Definitions, Differences, and When to Use Each
A GUI uses graphical elements for interaction. A CLI accepts typed text commands. This guide defines both interfaces, covers 6…
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Computer Basics
Memory Management in Operating Systems: How RAM is Allocated and Controlled
Memory management is the OS function that allocates, tracks, and reclaims RAM for processes. This guide covers virtual memory, paging,…
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Computer Basics
File Systems Explained: FAT32, NTFS, ext4, APFS, and How They Work
A file system is the method an OS uses to organize, store, and retrieve data on a storage device. This…
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Computer Basics
Processes vs Threads: Definitions, Differences, and How They Work
A process is an independent program in execution. A thread is a unit of execution within a process. This guide…
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Computer Basics
What Are Device Drivers? How Drivers Work and Why They Matter
A device driver is software that enables the operating system to communicate with specific hardware. This guide explains how drivers…
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Computer Basics
Computer Security Basics: The CIA Triad and Core Principles
Computer security protects systems, networks, and data from unauthorized access and damage. This guide covers the CIA triad, attack surfaces,…
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Computer Basics
Viruses, Worms, and Trojans: How Each Type of Malware Works
Viruses, worms, and trojans are 3 distinct types of malware with different propagation and payload mechanisms. This guide defines all…
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Computer Basics
What is Phishing? Types, How It Works, and How to Identify Attacks
Phishing is a social engineering attack that uses deceptive messages to steal credentials, financial data, or install malware. This guide…
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Computer Basics
What is the Internet? How It Works and Who Controls It
The Internet is a global network of interconnected computers that exchange data using standardized protocols. This guide covers how the…
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Computer Basics
What is a Firewall? Types, How It Works, and Configuration Basics
A firewall is a security system that monitors and controls incoming and outgoing network traffic based on rules. This guide…
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Computer Basics
Why Antivirus Software is Important: How It Works and Its Limitations
Antivirus software detects and removes malware by scanning files against known signatures and monitoring behavior. This guide covers how antivirus…
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Computer Basics
Online Safety for Beginners: 10 Practices That Protect Your Computer
Online safety involves protecting personal data and devices from cyber threats. This guide covers 10 foundational practices that protect a…
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Computer Basics
LAN vs WAN vs MAN: Network Types Defined and Compared
LAN, WAN, and MAN are 3 network types classified by geographic scale. This guide defines all 3, covers PAN and…
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Computer Basics
What is DNS? How the Domain Name System Translates Names to IP Addresses
DNS translates human-readable domain names into IP addresses. This guide covers how DNS works, the DNS resolution process, DNS record…
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Computer Basics
What is Wi-Fi? Standards, Frequencies, and How Wireless Networking Works
Wi-Fi is a wireless networking technology using radio waves to connect devices to a network. This guide covers how Wi-Fi…
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Computer Basics
What is an IP Address? IPv4, IPv6, and How IP Addressing Works
An IP address is a numerical label assigned to every device on a network. This guide explains IPv4 and IPv6…
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Computer Basics
How Data Travels on the Internet: Packets, Routing, and Protocols Explained
Data travels on the Internet as packets routed through networks using TCP/IP protocols. This guide explains packet switching, IP routing,…
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