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  • N4N055: A Wired NAC Walkthrough

    N4N055: A Wired NAC Walkthrough
    May 14 2026
    Today’s topic is Network Access Control (NAC) for a wired network. To help walk us through it all is Jennifer “JJ” Jabbusch, a network security architect, public speaker, book author, and co-host of the Packet Protector podcast. JJ and our hosts break down the terms and protocols behind NAC, and explain why the architecture was... Read more »
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    1 Std. und 16 Min.
  • N4N054: Network Access Control (NAC) Basics

    N4N054: Network Access Control (NAC) Basics
    Apr 30 2026
    Today’s episode is part one of a three part series to break down Network Access Control (NAC). Ethan and Holly start simple by explaining what NAC is at a high level and all of the jargon and acronyms that come with it. They also cover where and when network access control is applied, whether NAC... Read more »
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    1 Std. und 6 Min.
  • N4N053: Well Actually 03 – Multicast, Routing Protocols, RFC 1918

    N4N053: Well Actually 03 – Multicast, Routing Protocols, RFC 1918
    Apr 16 2026
    We asked for follow ups and you did not disappoint! On today’s show we respond to listener comments and corrections on multicast, routing protocols, security, and more. We also have a technical correction for the RFC 1918 Class B private address range. A big thank you to everyone who sent in responses. If you’d like... Read more »
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    57 Min.
  • N4N052: Multicast Part 2

    N4N052: Multicast Part 2
    Apr 2 2026
    Lenny Giuliano, Sr. Distinguished Systems Engineer at HPE Juniper Networks, joins Holly and Ethan for another round of multicast. Part two helps fill in details not covered in episode 50. They cover how multicast traffic also affects Ethernet frame addressing, and the key differences between IPv4 and IPv6 multicast. They also explain new hybrid multicast... Read more »
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    1 Std. und 25 Min.
  • N4N051: MPLS Fundamentals

    N4N051: MPLS Fundamentals
    Mar 19 2026
    Today’s topic is Multiprotocol Label Switching or MPLS, a foundational technology that powers service provider networks and enterprise WANs all over the world. To help us break it down, we’ve invited James Bensley, a Network Tech Lead who’s spent fifteen years with MPLS. James explains what spurred the creation of MPLS and how it works... Read more »
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    1 Std. und 8 Min.
  • 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 Std. und 21 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 Std. und 10 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 Std. und 24 Min.