How Networks Really Work

Overall rating: 4.93 Instructor: 4.94 Materials: 4.74 more …

It’s pretty easy to find material explaining how to configure network devices. Internet is full of recipes and sample designs (not all of them good), but it’s hard to find information on how networking technologies really work and even harder to find out the reasons they were implemented the way they were.

In the meantime, vendors prove validity of RFC1925 Rule 11 on daily basis, and many customers blindly trust the shiny new technologies because they lack historical insight:

  • Did we try similar things in the past?
  • Did they work?
  • Why did they fail?
  • Has anything changed in the meantime that might make them better?

This webinar will help you:

  • Realize why networking matters even if you’re an application developer
  • Understand how networking technologies really work
  • Grasp why they were designed the way they were
  • Identify similarities between supposedly new ideas and past attempts

Live Sessions

The next live session of this webinar will take place in Winter 2020.

After describing the basics of routing protocols, we'll dive deep into advanced features like equal- and unequal-cost multipathing, fate sharing, fast converge and loop-free alternates.

Don't have a subscription yet? Hurry up, so you can be there in person and ask interesting questions.


This webinar is part of Networking Fundamentals roadmap and accessible with standard subscription

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The webinar currently covers these topics:

  • Fallacies of Distributed Computing
  • Why networking matters and why should every IT professional be interested in networking fundamentals
  • Overview of networking challenges
  • The importance of layered structure of a networking stack
  • Addressing throughout the network stack
    (local/global, address mapping, summarization, address assignment)
  • Getting packets across the network
    (source routing, virtual circuits, transparent bridging, hop-by-hop routing)
  • Differences between transparent bridging and IP routing (and why they matter)
  • Routing protocols basics
    (concepts, link-state, distance-vector and path-vector protocols, selecting an optimal routing protocol based on the use case)

The upcoming live sessions will address:

  • Advanced routing protocol topics (convergence, shared fate, unequal-cost load balancing, LFA, remote LFA, tunneling considerations)
  • Transmitting bits and messages (from asynchronous transport and clock recovery to escaping, zero-insertion and quoting)
  • Layer-2 line disciplines
  • Cell-mode versus packet-mode transport
  • Connection-oriented versus connectionless transport
  • The intractability of QoS
  • Congestion detection
  • In-band versus out-of-band signaling
  • Message- versus stream-oriented transport protocols
  • A day in a life of a web session

Happy Campers

About the webinar

I am older than Ethernet. This brings back a lot of memories of the good old days of networking some good some bad. Pretty interesting to have all this put together as one whole picture of the evolution of Packet and character stream technology.
jim warner
It's one of the best technical resources for people who want to improve themselves professionally.

There's a wealth of knowledge on this site and this webinar only scratches the surface.
Aaron Robinett
As always another webinar of great value for networking engineers.
Gabriel Sulbaran

About the instructor

I almost always play the recordings at 1.5X their original speed.
jim warner

About the materials

It's fascinating to learn about the history why various standards got put in place that ignored the end to end principle.
Aaron Robinett

About the Author

Ivan PepelnjakIvan Pepelnjak, CCIE#1354 Emeritus, is an independent network architect, book author, blogger and regular speaker at industry events like Interop, RIPE and regional NOG meetings. He has been designing and implementing large-scale service provider and enterprise networks since 1990, and is currently using his expertise to help multinational enterprises and large cloud- and service providers design next-generation data center and cloud infrastructure using Software-Defined Networking (SDN) and Network Function Virtualization (NFV) approaches and technologies.

Ivan is the author of several books covering data center technologies, highly praised webinars, and dozens of data center and cloud-related technical articles published on his blog.

More about Ivan Pepelnjak