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What is a VPN concentrator? Understand its role today
As organizations shift to hybrid and remote models, secure remote access has become a core IT requirement. Virtual private netwoks (VPNs) are widely used to meet this need by encrypting remote connect...
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What is email encryption, and why does it matter?
Email encryption is a security method that protects the contents of an email. It matters because, without encryption, emails would travel across the internet in plaintext, making it easy for third par...
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What can someone do with my email address without a password?
An email address can reveal more than most people realize. In the wrong hands, it could help locate social media profiles, build a personal profile for targeted attacks, or launch phishing and spam ca...
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Wireless network connection: Basics and beyond
When people mention wireless network connection, they’re usually talking about Wi-Fi. The terms are often used interchangeably, but Wi-Fi is actually just one type of wireless technology. “Wireles...
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How to set up a virtual machine safely and avoid common mistakes
Virtual machines (VMs) let one physical computer run multiple OSs. Setup requirements vary depending on the hypervisor and the isolation/networking choices, so it can feel complex. This guide explains...
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Most secure Linux distro: Best picks by threat model
Choosing the most secure Linux distro is about matching the system to its intended use, the sensitivity of the data it handles, and the level of setup and ongoing maintenance that are realistic. In ma...
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What is HTTP/3 and should you use it?
HTTP/3 is the newest version of Hypertext Transfer Protocol (HTTP), the protocol that allows browsers to request web pages and servers to send them back. It defines how those requests and responses ar...
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What is the SMTP protocol, and how does it work?
The Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending and relaying email across the internet. When an email is sent, the email app (or webmail) submits the message to an outgoi...
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How to get your IP address on Linux: Methods and troubleshooting
Your Internet Protocol (IP) address is a key part of how your Linux system connects to networks and the internet. Whether you are setting up a new connection, verifying network settings, or troublesho...
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What does nslookup do? A practical guide
Nslookup is a network troubleshooting utility that queries Domain Name System (DNS) servers to retrieve information about domain names and IP addresses. This guide explains how the nslookup command wo...