Episodios

  • N4N039: Configuring an IPsec Tunnel

    N4N039: Configuring an IPsec Tunnel
    Sep 25 2025
    We dive back into the world of IPsec with an episode dedicated to configuring IPsec tunnels. After discussing a listener comment regarding transport mode in IPsec tunnels, Ethan Banks and Holly Metlitzky work through topics such as multi-vendor IPsec configuration, licensing, and the details of configuration and routing. Bonus material: MTU size and NAT-T. Episode... Read more »
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    1 h y 1 m
  • N4N038: Well Actually 02 – OSPF Multi-Area and LSA Types

    N4N038: Well Actually 02 – OSPF Multi-Area and LSA Types
    Sep 15 2025
    We got some interesting listener feedback from our series on OSPF, so today’s N Is for Networking is another “Well actually” episode where we dig into that feedback. In particular, we’ll cover a defense of OSPF multi-area deployments, and dig into OSPF LSA types. Episode Links: OSPF Basics – N Is For Networking Episode 38... Read more »
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    50 m
  • N4N037: IPsec Basics

    N4N037: IPsec Basics
    Aug 28 2025
    It’s time to talk crypto. No, not the Bitcoin kind. Ethan and Holly introduce the basics of IPsec, the protocol that authenticates and encrypts traffic between endpoints. They discuss what it is, how it provides trustworthiness and secrecy to IP traffic, and common use cases. They review the different types of IPsec protocols and modes,... Read more »
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    58 m
  • N4N036: OSPF Area Types

    N4N036: OSPF Area Types
    Aug 14 2025
    Ethan and Holly bring you the last installment of the OSPF series discussing OSPF area types. They discuss why OSPF areas exist, do a quick recap of what OSPF areas actually are, and then introduce the different types of OSPF areas. Lastly, see if you can answer Ethan’s rapid-fire OSPF questions. Episode Transcript: This episode... Read more »
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    1 h y 9 m
  • N4N035: Well Actually . . . Listener Comments and Corrections

    N4N035: Well Actually . . . Listener Comments and Corrections
    Jul 31 2025
    We ask listeners for follow up and you’ve sent it in. On today’s show we respond to listener comments and corrections on tunneling, the link aggregation control protocol, link aggregation in general, and DHCP options. We also talk about the network engineering certification journey. If you’ve got a “Well, actually” or any other follow up,... Read more »
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    47 m
  • N4N034: OSPF Network Types

    N4N034: OSPF Network Types
    Jul 24 2025
    Ethan and Holly continue their OSPF journey this week with OSPF Network Types. They discuss the two main OSPF network types used today: the broadcast and point to point networks. They also explain designated routers, backup designated routers, and when those are used and why. Lastly they discuss some soft skills – knowing your vendor... Read more »
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    43 m
  • N4N033: OSPF Neighbor Formation and Timers

    N4N033: OSPF Neighbor Formation and Timers
    Jul 17 2025
    Our OSPF series continues with a look at OSPF neighbor formation and related timers. We talk about the five major packet types that carry information among OSPF routers, how OSPF routers become neighbors, how they negotiate link-state database exchanges, keep-alive messages, and how they negotiate designated and backup routers when multiple devices are on the... Read more »
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    57 m
  • N4N032: OSPF Basics

    N4N032: OSPF Basics
    Jun 26 2025
    By popular request (and now that we have some other background topics covered) we start our series on the Open Shortest Path First (OSPF) routing protocol. We kick off the series with OSPF basics including Link State Advertisements, Link State Database, and other related essentials. We’ll explore additional OSPF topics over subsequent episodes. This week’s... Read more »
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    57 m