IT & security concepts, explained
Plain-English explainers — what a concept is, how it works and why it matters — so you go from 'what is that?' to confident in a few minutes.
34 results
Open-Source PDF Editors 2026: 8 Best Free Tools
Ranked guide to the best open-source PDF editors in 2026. All free, no subscription, runs offline. Stirling PDF leads with 50+ tools and self-hosted privacy.
VPN Explained: What It Is and How It Works for IT Pros
A VPN encrypts traffic and masks your IP address. VPN exploits grew eightfold in 2025 DBIR data. Here is what IT pros need to know before deploying one.
AI Coding Assistants Explained: What They Are and How to Choose
AI coding assistants use large language models to write, refactor, and debug code. With context windows up to 200,000 tokens and 51% of developers using them daily in 2025, here is how to pick the right one.
Password Managers Explained: What They Are and How to Choose
A password manager stores and autofills credentials in an AES-256 encrypted vault so you use strong, unique passwords without memorising them. CISA recommends one for every account.
Unified Endpoint Management: Microsoft Intune vs VMware Workspace ONE
Microsoft Intune and VMware Workspace ONE lead a UEM market valued at USD 8.85B in 2026 and growing at 25.74% CAGR. Compare both platforms side-by-side and find the right fit.
VMware vs Proxmox: Choose the Right Hypervisor in 2026
VMware vs Proxmox: after Broadcom's 2024 per-core pricing shift, see which Type-1 hypervisor fits your budget and workload.
Identity Theft After a Data Breach: What It Is and How to Respond
Identity theft after a data breach can surface months later. Learn why a credit freeze beats a fraud alert, and what IT pros must do first after breach notification.
DAS, NAS, and SAN Explained: Storage Architectures for IT Pros
DAS, NAS, and SAN are the three core enterprise storage architectures. Learn how each works, when to use them, and how they compare to cloud storage.
Microsoft Paint: Features, Tools and Windows 11 Updates
Microsoft Paint ships free on every Windows PC and now offers one-click background removal, dark mode, and AI Generative Fill on Copilot+ PCs - no install needed.
Process Explorer: The Upgraded Windows Task Manager
Process Explorer is a free Sysinternals tool with handle, DLL, and thread visibility across 9+ real-time columns - far beyond what Windows Task Manager shows.
PaaS Explained: What It Is, How It Works & When to Use It
PaaS gives developers a managed cloud environment to build and deploy apps. The global PaaS market hit $176B in 2024. Here is what you need to know.
Notion vs Obsidian for IT Pros: Storage, Sync & Collaboration
Obsidian stores notes as local .md files with no cloud dependency; Notion syncs in real time. Compare storage, pricing, and collaboration for IT teams.
SMB Ports 445, 139, 138, and 137 Explained
SMB uses TCP 445 for modern traffic and NetBIOS ports 137-139 for legacy. Microsoft dropped NetBIOS transport with Vista/Server 2008. Here is what to block and why.
MX Record Bypass: How Attackers Skip Third-Party Spam Filters
MX record bypass lets attackers deliver email directly to Microsoft 365, skipping third-party spam filters. In Q1 2024, SEG-bypassing phishing rose 52.2%. Here is how to close the gap.
Get-MgUser: Query Entra ID Users with PowerShell
Get-MgUser retrieves Entra ID user data via the Microsoft Graph PowerShell SDK. By default it returns only a property subset - use -Property and -ConsistencyLevel for full results.
Windows 11 Generic Product Keys: What They Are and How They Work
Windows 11 generic product keys let you install or switch editions for testing but never permanently activate Windows. Microsoft publishes them openly for lab and VM use across all major editions.
Windows 11 Build Numbers: Versions, Updates & Lifecycle
Windows 11 build numbers identify the exact OS version and patch level installed, helping sysadmins verify compliance, track updates, and plan servicing across 24H2, 23H2, and older branches still in production.
DICOM Explained: What It Is, How It Works, and Why IT Teams Care
DICOM defines both the file format and 5 network service classes powering every PACS and imaging modality. Only 0.14% of exposed servers use TLS.
IPv6 Explained: Definition, How It Works and Why It Matters
IPv6 uses 128-bit addresses to deliver 340 undecillion unique IPs. Global adoption hit ~43% in early 2025, with France and India both above 70%.
SCADA Explained: Definition, How It Works & Security Risks
SCADA powers 16 critical infrastructure sectors. Learn its 4 core components, how data flows from sensor to control room, and the security risks IT teams must address.