Networking

What Is the OSI Model? A Non-Boring Guide to the 7 Layers

Learn how the OSI Model works, what each of its seven layers does, how data moves through the stack, and how network security applies across the layers.

What Is DHCP and How Does It Work?

Learn how DHCP automatically assigns IP addresses and network settings to devices, how the DORA process works, what IP leases are, and how rogue DHCP servers can threaten a network.

What Is DNS? How the Internet's Phonebook Works

Learn how DNS translates domain names into IP addresses, how DNS resolution works, common DNS attacks, and practical ways to secure DNS.