DHCP Explained: How Devices Get an IP Address, Gateway, and DNS Settings
Learn what a DHCP lease contains, why addresses change, when to use reservations, and how DHCP conflicts break a network.
Technical Articles
Router vs. Modem vs. Gateway vs. ONT: What Each Box Actually Does
Understand which device terminates the ISP connection, which routes your LAN, and why combined gateways make troubleshooting confusing.
What Is CIDR? A Plain-English Guide to Prefix Lengths and IPv4 Subnets
Understand what /24, /16, and other CIDR prefixes mean, how subnet size is calculated, and where network and broadcast addresses fit.
What Is CIDR? A Plain-English Guide to CIDR Notation and Subnetting
CIDR notation — the '/24' you see after an IP address — tells you how a network is split between the network itself and the individual devices on it. Here's how to read it and calculate it.