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Virtual LANs (VLANs) are one of the most important yet overlooked tools in business networking. By logically segmenting a single physical network into isolated broadcast domains, VLANs improve security, boost performance, and simplify management. This guide explains how VLANs work, why they matter, and how to start using them on your managed switch.

Every internet connection begins with a DNS query, making DNS the ideal chokepoint for blocking threats before they ever reach your network. DNS filtering is fast to deploy, requires no endpoint software, and stops phishing sites, malware domains, and shadow IT at the query level. This article explains how it works and why it should be part of every organisation’s security stack.