Épisodes

  • N4N050: Multicast Fundamentals

    N4N050: Multicast Fundamentals
    Mar 5 2026
    Today’s learning adventure is an overview of multicast. Ethan and Holly have invited a guest to share his multicast expertise: Lenny Giuliano, Sr. Distinguished Systems Engineer at HPE Juniper Networks. Lenny guides them through multicast principles and shares examples of where and how it’s used in live networks. He also explains how the OSPF routing... Read more »
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    1 h et 21 min
  • N4N048: QoS Fundamentals

    N4N048: QoS Fundamentals
    Feb 5 2026
    Quality of Service (QoS) is a huge topic with a punishingly large group of acronyms. Join Ethan and Holly as they help you build a mental framework of what QoS is and what it solves. Not only do they break down essential acronyms, they also discuss QoS fundamentals, define the major groups of QoS tools,... Read more »
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    1 h et 24 min
  • N4N049: Understanding Firewalls

    N4N049: Understanding Firewalls
    Feb 19 2026
    Today, Ethan and Holly provide an overview of firewalls. While cybersecurity is a separate discipline from network engineering, much of what happens in cybersecurity is interesting at the packet level, so there’s a good deal of overlap. It’s likely that as a network engineer, you’ll be managing, or at least dealing with, firewalls in your... Read more »
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    1 h et 10 min
  • N4N047: Virtual Router Redundancy Protocol (VRRP)

    N4N047: Virtual Router Redundancy Protocol (VRRP)
    Jan 22 2026
    Go beyond the basics to understand the mechanics that keep your default gateway from becoming a single point of failure. Ethan and Holly demystify Virtual Router Redundancy Protocol (VRRP), which helps provide network redundancy. They break down everything from the VRRP election protocol to the protocol’s unique communication methods. They also look back at previous... Read more »
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    1 h et 8 min
  • N4N045: Audience Follow Up & 2026 Preview

    N4N045: Audience Follow Up & 2026 Preview
    Dec 18 2025
    If you’re curious as to what Ethan and Holly have in store for 2026, they give you a sneak peak on today’s episode. Hint: Some of these topics might include letters like B, G, P, Q, o, S, A and I. They also take time in this episode to answer listener questions, ranging from how... Read more »
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    59 min
  • N4N046: In-Band vs. Out-of-Band Management

    N4N046: In-Band vs. Out-of-Band Management
    Jan 8 2026
    Ethan and Holly discuss the major differences between In-band and Out-of-band (OOB) management and the pros and cons of both. They explore how to implement a proper OOB network and critical use cases where OOB is required. They also explain the differences and roles of the data plane, the control plane, and the management plane.... Read more »
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    1 h et 4 min
  • N4N044: Redundancy Vs. High Availability Part 2 – HA Networking Isn’t Free

    N4N044: Redundancy Vs. High Availability Part 2 – HA Networking Isn’t Free
    Dec 4 2025
    In Part 1 of Redundancy vs. High Availability, we said that sometimes high availability and redundancy are considered to be the same thing, but we disagree. Holly and Ethan do agree that high availability can be considered a network design goal, and that redundancy is just one technique that can be used to help make... Read more »
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    56 min
  • N4N043: Redundancy vs. High Availability Part 1

    N4N043: Redundancy vs. High Availability Part 1
    Nov 20 2025
    In today’s chat, Holly and Ethan consider a question from listener Douglas who asks, “How do you approach designing a network for high availability and redundancy?” They start by defining differences between redundancy and high availability, and talk about Holly’s experience with her own customers. Then they share examples of how to achieve redundancy in... Read more »
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    1 h