Hello all,

I just released the latest addition to my free, Networking Fundamentals series:

https://www.youtube.com/watch?v=zmxLg4jV0ts

In this video we provide a brief introduction to Network Design concepts. We discuss how Routers are typically deployed in a Hierarchy, and the benefits this achieves. One of those benefits is the ability to Summarize Routes for the sake of reducing the number of entries in the Routing Table. We show you some examples of Route Summarization, all the way through to the ultimate route summary known as the Default Route (0.0.0.0 /0).

This is the 11th video in the Networking Fundamentals series. The purpose of this series is to teach anyone the very core of Networking: How data moves through the Internet.

This should be the first videos you watch before starting your CCNA journey. It will properly frame everything else you will learn with the CCNA. This framing will make learning and understanding everything else much easier.

If you're already in the middle of your CCNA journey, I still think this series will be absolute gold for you. Start at the OSI Model videos (1 2) and watch them at 2x speed. See what you think. See whether you appreciate my teaching style. See if even in a "fundamentals" type video you can learn something about how the OSI model works (and not just more rote memorization about each layer). If you learn something, then you'll know to come back and watch the full series.

• Network Devices - Part 1 - Hosts, Clients, Servers, IP Addresses, Networks
• Network Devices - Part 2 - Repeaters, Hubs, Switches, Routers
• OSI Model - Part 1 - Layer 1, Layer 2, Layer 3
• OSI Model - Part 2 - Layer 4, Layer 5/6/7, Encapsulation De-Encapsulation
• Everything Hosts do to speak to other Hosts on the Same network
• Everything Hosts do to speak to other Hosts on the Foreign networks
• Everything Switches do to facilitate communication - Part 1
• Everything Switches do - Part 2 - Unicast Flooding, VLANs, Multiple Switches
• Everything Routers do - Part 1 - Routing Table and how it's Populated
• Everything Routers do - Part 2 - Using the Routing Table and ARP table to forward packets
• Everything Routers do - Part 3 - Network Design - Router Hierarchies - Route Summarization (just released!)
• Networking Protocols - ARP, FTP, SMTP, HTTP, SSL, TLS, HTTPS, DNS, DHCP (releasing next week)