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Border Gateway Protocol is the glue of the internet, responsible for exchanging routing information between the tens of thousands of autonomous systems that make up the global network.

A VLAN lets you create multiple isolated broadcast domains on a single physical switch — improving security and simplifying network management.

Subnetting lets you carve a large IP block into smaller, manageable segments. CIDR notation makes this process both flexible and compact.

TCP guarantees delivery and order; UDP trades those guarantees for speed. Understanding the difference is key to designing efficient networked applications.

Every time you type a URL into your browser, DNS translates that human-readable name into a machine-routable IP address — here's how.