# | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

A

1. Antivirus (AV): Protects your computer from viruses and malware. Think of it like a digital immune system.
2. API (Application Programming Interface): Lets different software talk to each other. Like a translator between apps.
3. Authentication: Checking that you are who you say you are. Usually with a password or code.
4. Active Directory (AD): Keeps track of users and devices in an office network. Like a staff directory for your IT systems.
5. Access Control: Rules about who can use which systems. Like having keys to certain rooms only.
6. AI (Artificial Intelligence): Software that can make decisions or predictions. Like a smart assistant that learns from patterns.
7. Application: A program that helps you do tasks. For example, Microsoft Word or your email app.

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B

1. Backup: Making copies of your files in case of loss. Like having a spare key for your data.
2. Bandwidth: How much information your internet can carry. More bandwidth = faster internet.
3. Bot: Software that performs automatic tasks. Some are helpful, some are malicious.
4. Brute Force Attack: Hackers guessing passwords repeatedly. Like trying every key on a keyring to open a door.
5. Browser: Software to access websites. Chrome, Edge, and Firefox are examples.
6. Bug: A problem in software causing it to misbehave. Like a glitch in a TV remote.
7. Business Continuity Plan (BCP): A plan to keep your business running after IT problems. Like having a backup generator for emergencies.

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C

1. Cloud Computing: Using the internet to store and run software. Think of it as storing files in a virtual locker online.
2. Cybersecurity: Protecting your computers and data from attacks. Like locking your doors and windows digitally.
3. Cookies: Small files saved by websites. They help remember your preferences.
4. Cache: Temporary storage for quick access to files. Like keeping frequently used tools on your desk.
5. Configuration: How devices or software are set up. Like arranging furniture to suit your needs.
6. Credential: Login details like a username and password. Your digital ID card.
7. Command Line Interface (CLI): Text-based way to control a computer. Like giving typed instructions instead of clicking buttons.

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D

1. Data Breach: When someone steals sensitive information. Like a thief breaking into a safe.
2. DNS (Domain Name System): Translates website names into addresses computers understand. Like a phonebook for the internet.
3. Domain: Your website or network name. For example, itfixio.co.uk.
4. Drive: A place to store files. Like a digital filing cabinet.
5. Downtime: When systems aren’t working. Like a power outage at the office.
6. Digital Signature: Verifies the authenticity of a document. Like signing a letter to prove it’s from you.
7. Disaster Recovery (DR): Steps to get IT systems back after a failure. Like having a backup plan after a flood.

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E

1. Encryption: Scrambles data so only authorized people can read it. Like writing in code that only your team can understand.
2. Endpoint: Any device connected to your network. Laptops, phones, or tablets are all endpoints.
3. Email Filtering: Blocks spam or harmful messages. Like a receptionist screening your mail.
4. Ethernet: Wired network connection. Like a cable connecting your computer directly to the internet.
5. Escalation: Passing an issue to higher-level IT support. Like asking the manager when the receptionist can’t help.
6. Extranet: A private network shared with selected external partners. Like a members-only online portal.
7. Event Log: Record of activities on a system. Like a diary of what your computer did.

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F

1. Firewall: Protects your network by controlling traffic. Think of it as a security guard for your digital doors.
2. Firmware: Built-in software inside devices. Like the engine in a car controlling how it runs.
3. File Server: Central storage for shared files. Like a library for your office documents.
4. Form Factor: The size and shape of hardware. Like the difference between a laptop and a tablet.
5. Full Disk Encryption (FDE): Protects all data on a device. Even if someone steals your laptop, they can’t read the files.
6. File Transfer Protocol (FTP): Standard way to send files over the internet. Like using a courier to deliver digital files.
7. Fault Tolerance: Systems keep running even if something fails. Like a backup generator during a blackout.

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G

1. Gigabyte (GB): Unit of data storage. Roughly enough for hundreds of photos.
2. GPU (Graphics Processing Unit): Handles images and videos. Like a specialist painter for your computer screen.
3. Gateway: Connects two networks. Like a bridge between two islands.
4. Group Policy: Rules applied to users and devices. Like company policies for office computers.
5. GUI (Graphical User Interface): Visual way to interact with software. Like clicking icons instead of typing commands.
6. Green IT: Environmentally friendly tech practices. Like recycling old computers responsibly.
7. Grid Computing: Multiple devices working together to solve problems. Like a team lifting a heavy object together.

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H

1. Hardware: Physical devices like computers, printers, and routers. The “body” of IT systems.
2. HTTPS: Secure website connection. Look for the padlock in your browser.
3. Hub: Device connecting multiple devices in a network. Like a roundabout for data traffic.
4. Hypervisor: Runs virtual computers on one physical machine. Like having multiple apartments in one building.
5. Hashing: Converts data into a code for verification. Like fingerprinting a file to ensure it hasn’t changed.
6. Hotspot: Wi-Fi access point. Like a mini-internet café for your devices.
7. Hybrid Cloud: Mix of public and private cloud services. Like storing some files at home and some in a locker at a bank.

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I

1. IP Address: Unique number identifying your device on a network. Like a home address for your computer.
2. IT Support / Managed Services: Professional help keeping your systems running. Like having an IT team on call 24/7.
3. IoT (Internet of Things): Everyday devices connected to the internet. Smart fridges, lights, and printers.
4. Incident: Any unplanned event affecting IT. Like a printer suddenly stopping in the office.
5. Infrastructure: Core equipment supporting IT systems. The foundation of your digital office.
6. Intrusion Detection System (IDS): Monitors for cyber threats. Like a security alarm for your network.
7. Interface: Where systems or users connect with software. Like a dashboard showing key controls.

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J

1. Java: Popular programming language used in many apps and websites. Like the engine under the hood of a car.
2. JavaScript: Language that makes websites interactive. Like adding buttons and animations to a webpage.
3. Joystick: Device used to control games or software. Like a steering wheel for digital control.
4. Jump Server: Special server used to securely access other systems. Like a secure doorway into restricted areas.
5. JSON (JavaScript Object Notation): Format for storing and sending data. Like a structured list that computers can read easily.
6. Job Scheduling: Setting tasks to run automatically at certain times. Like a digital alarm clock for processes.
7. Journal: Log of events or changes in a system. Like a diary for your IT operations.

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K

1. Kernel: Core part of an operating system managing hardware and software. Like the engine of a computer OS.
2. Keylogger: Software that records keystrokes. Like a spy taking notes on every key you press.
3. Key Management: How encryption keys are stored and handled. Like keeping safe the keys to your safe.
4. Knowledge Base: Collection of helpful IT articles and guides. Like an instruction manual for solving tech problems.
5. Kiosk Mode: Restricts a device to one application. Like locking a tablet to only show a menu in a restaurant.
6. Kickstart: Automated system setup for computers. Like a digital assembly line for new machines.
7. Kubernetes: System for managing multiple software containers. Like a traffic controller for apps.

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L

1. LAN (Local Area Network): Network connecting devices in one place. Like office computers all linked together.
2. Latency: Delay in network response. Like waiting for a page to load slowly.
3. License Key: Code that allows software to be legally used. Like a ticket granting entry.
4. Load Balancer: Shares work between multiple servers. Like splitting tasks between team members.
5. Log File: Record of system or app activity. Like a diary for your computer.
6. Local Backup: Data stored on-site for protection. Like keeping a spare copy of files in your office.
7. LDAP (Lightweight Directory Access Protocol): System to manage users and access. Like a digital staff directory.

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M

1. Malware: Software that harms your devices. Like a digital germ that can make systems sick.
2. Managed Services: IT experts maintaining your systems. Like having an IT team on standby 24/7.
3. Megabyte (MB): Measure of data storage. Enough to store hundreds of photos.
4. Migration: Moving data or systems to a new setup. Like moving offices to a new building.
5. Motherboard: Main circuit board in a computer. Like the backbone of your computer.
6. Multifactor Authentication (MFA): Extra security using two or more verification methods. Like needing both a key and a PIN to enter a building.
7. Monitoring: Watching systems to spot issues early. Like having CCTV for your network.

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N

1. Network: Connected devices sharing data. Like an office phone system linking everyone.
2. NAS (Network Attached Storage): Shared storage device. Like a digital filing cabinet for the team.
3. Node: Any device connected to a network. Like a point on a map.
4. Network Protocol: Rules devices follow to communicate. Like traffic laws for data.
5. NAT (Network Address Translation): Hides internal IP addresses for security. Like giving your house a hidden mailbox number.
6. Null Route: Blocks unwanted network traffic. Like closing a road to stop cars.
7. Notification: Alert of events or issues. Like a reminder popping up on your phone.

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O

1. Operating System (OS): Software controlling hardware and apps. Like the manager of your computer.
2. Office 365 / Microsoft 365: Cloud tools for productivity. Like digital office software accessible anywhere.
3. Open Source: Software with code anyone can use or modify. Like a community recipe book.
4. Outage: Temporary loss of systems. Like a power cut at work.
5. Optical Drive: Reads/writes CDs or DVDs. Like a DVD player for your computer.
6. Overclocking: Running hardware faster than intended. Like pushing a car engine beyond normal speed.
7. On-Premises: Systems hosted in your office, not the cloud. Like having a safe in your own home instead of a bank.

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P

1. Patch: Software update fixing bugs or security holes. Like applying medicine to a system.
2. Phishing: Fake emails trying to steal info. Like a scammer pretending to be your bank.
3. Power Supply Unit (PSU): Provides electricity to a computer. Like the heart pumping power.
4. Protocol: Rules for communication between devices. Like grammar rules for a language.
5. Privileged Account: Account with extra access. Like a master key.
6. Proxy Server: Intermediary for internet access. Like a receptionist answering calls for you.
7. Partition: Dividing storage for organization. Like separate drawers in a filing cabinet.

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Q

1. QoS (Quality of Service): Prioritizes important network traffic. Like giving VIP access to key messages.
2. Query: Requesting information from a database. Like asking the librarian for a book.
3. Queue: Line of tasks waiting to be processed. Like waiting in line at a shop.
4. Quarantine: Isolating infected files. Like putting sick people in separate rooms.
5. Quick Response (QR) Code: Barcode storing data. Like a shortcut to a website.
6. Quantum Computing: Advanced computers using quantum bits. Like super-fast calculators for complex problems.
7. Query Optimization: Making database requests faster. Like taking the fastest route to the library.

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R

1. Ransomware: Malware that locks your files until you pay. Like a thief holding your documents hostage.
2. Router: Device directing internet traffic. Like a traffic officer for your network.
3. Recovery Point Objective (RPO): Maximum data you can afford to lose. Like deciding how many files to backup daily.
4. Recovery Time Objective (RTO): Maximum downtime you can tolerate. Like how long a store can stay closed after a power cut.
5. Root Access: Full control of a system. Like having the master key to a building.
6. Remote Desktop: Accessing a computer from afar. Like controlling your office computer from home.
7. Replication: Copying data to multiple locations. Like making duplicates of important documents.

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S

1. Server: Computer providing services to others. Like a waiter delivering data on request.
2. SLA (Service Level Agreement): Agreement defining IT service expectations. Like a promise for delivery times.
3. Software: Programs running on devices. Like apps on your phone or computer.
4. Spam: Unwanted emails. Like junk mail for your inbox.
5. SQL (Structured Query Language): Language for managing databases. Like asking a library for specific books.
6. Subnet: Dividing a network into sections. Like separate lanes on a highway.
7. Synchronization: Keeping data consistent across devices. Like ensuring everyone has the latest version of a document.

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T

1. Two-Factor Authentication (2FA): Extra login security. Like needing both a key and a PIN.
2. Troubleshooting: Finding and fixing IT problems. Like a mechanic diagnosing a car issue.
3. Token: Digital key for access. Like a ticket for secure entry.
4. TLS (Transport Layer Security): Secures internet connections. Like sealing a letter in an envelope.
5. Thin Client: Device relying on a server for computing. Like a lightweight laptop that does most work elsewhere.
6. Topology: How network devices are arranged. Like a map of roads connecting towns.
7. Threat Detection: Spotting potential security risks. Like a smoke alarm alerting you to fire.

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U

1. Uptime: Time systems are operational. Like a store staying open all day.
2. User Account: Profile granting access. Like a key card for an employee.
3. Utility Software: Tools that help manage devices. Like a toolbox for your computer.
4. Uninterruptible Power Supply (UPS): Backup power during outages. Like a spare battery for your office.
5. Update: Installing the latest fixes or features. Like upgrading your phone apps.
6. URL (Uniform Resource Locator): Website address. Like a home address for a website.
7. USB (Universal Serial Bus): Port for connecting devices. Like a plug for data and power.

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V

1. VPN (Virtual Private Network): Secure connection to the internet. Like a private tunnel for your data.
2. Virus: Malicious software. Like a digital flu for your computer.
3. Virtual Machine (VM): Software-based computer inside a real one. Like a house inside another house.
4. Version Control: Tracking changes to files. Like keeping a diary of edits.
5. VoIP (Voice over Internet Protocol): Making calls via the internet. Like Skype or Teams calls instead of a phone line.
6. VLAN (Virtual LAN): Network sections separated logically. Like separate departments in one building.
7. Vulnerability: Weakness in a system. Like an unlocked door that a thief could exploit.

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W

1. WAN (Wide Area Network): Network covering a large area. Like connecting multiple offices in different cities.
2. Wi-Fi: Wireless internet connection. Like the invisible cord connecting your devices.
3. Workstation: Computer for business tasks. Like an office desk but digital.
4. Web Server: Hosts websites. Like a waiter serving web pages to visitors.
5. White Hat Hacker: Ethical hacker who finds vulnerabilities. Like a security consultant testing your locks.
6. Workflow: Sequence of tasks in IT operations. Like a to-do list for your team.
7. WORM (Write Once, Read Many): Storage that cannot be changed once written. Like writing in permanent ink.

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X

1. XML (Extensible Markup Language): Stores and transports data. Like a digital filing system.
2. XaaS (Anything as a Service): IT services delivered via the cloud. Like renting software instead of buying it.
3. XDR (Extended Detection and Response): Detects advanced threats across networks. Like an all-seeing security system.
4. XSS (Cross-Site Scripting): Web vulnerability allowing malicious code. Like someone sneaking graffiti onto your website.
5. Xen: Virtualization platform for running multiple virtual computers. Like creating multiple apartments in one building.
6. XPath: Finds data in XML documents. Like a GPS for your digital files.
7. XMPP (Extensible Messaging and Presence Protocol): Protocol for instant messaging. Like the language behind chat apps.

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Y

1. Yottabyte (YB): Extremely large storage unit. Like having enough space for all the world’s digital data.
2. Yagi Antenna: Directional antenna for wireless signals. Like a spotlight sending Wi-Fi in one direction.
3. Yield: Measures system performance. Like checking how many packages are processed per hour.
4. YouTube Data API: Accesses YouTube analytics. Like checking store stats online.
5. Y2K Compliance: Ensuring systems handle year changes. Like preparing clocks for midnight on New Year’s Eve.
6. Your IT Policy: Rules for managing IT usage. Like office rules for proper device use.
7. YAML (Yet Another Markup Language): Stores configuration files. Like an instruction sheet for computers.

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Z

1. Zero-Day: Newly discovered security weakness. Like a hidden door a burglar can use before it’s fixed.
2. Zombie Computer: Infected device controlled by hackers. Like a puppet being used without knowing it.
3. Zip File: Compressed file to save space. Like packing clothes tightly in a suitcase.
4. Zone Transfer: Copying DNS info between servers. Like sending a master address list to branch offices.
5. Zero Trust: Security approach trusting no one by default. Like checking everyone at the door even if they work there.
6. Zettabyte (ZB): Massive storage unit. Like holding enough data for the entire world.
7. Zoom Meeting Integration: Linking IT systems with video calls. Like syncing your calendar with online meetings.

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