Switches are simple devices at heart — they forward frames...

In this lesson I will explain how PVST+ works and...

Most people encounter EtherChannels in their Layer 2 form —...

Two switches. Four cables running between them. Spanning Tree blocking...

Most office desks have both a computer and an IP...

When 802.1Q trunking carries traffic between switches, it tags Ethernet...

Cisco switches have a built-in ability to negotiate whether a...

Managing VLANs across a large network is one of those...

In switched networks, connecting multiple VLANs across devices often requires...

802.1Q is the IEEE standard that allows switches to carry...

When you first connect to a Cisco switch, almost everything...

Virtual Local Area Networks, or VLANs, offer a smart way...

When you type a website address into your browser, you...

The Transmission Control Protocol, or TCP, plays a crucial role...

When data travels across networks, it relies on protocols to...

If you’ve studied the OSI model and how data moves...

Introduction In the world of computer networking, the Internet Protocol...

Welcome to IP Basics If you’re studying for your CCNA...

When I first started working with networks, everything felt fragmented...

As a seasoned network engineer with over a decade in...

Introduction Picture this: You’re in the middle of a busy...