What Is a VLAN? A Beginner's Guide to Network Segmentation
Learn how VLANs separate devices on one network, how access and trunk ports work, and what to check before deploying VLANs in a small business.
Articles Tagged Networking
Practical FOO.XYZ guides tagged Networking, with commands and troubleshooting examples.
What Is DNS and How Does It Work?
Learn how DNS turns domain names into IP addresses, how servers and caches handle a lookup, and why finding an address differs from loading a page.
Dangling DNS Records, Placeholder Domains, and the Cost of Lazy IT
Forgotten DNS records and placeholder domains can expose sensitive information. Learn how misconfigurations lead to unexpected DNS traffic and email leaks.