N Is For Networking

This week we continue with DNS. In our last episode we covered the basics; today we expand our scope to cover topics such as security for DNS, reverse DNS, and DNS record types. For dessert this week, a serving of Raspberry Pi and Happy Eyeballs. Episode Links: DNS: Turning Names into Numbers – N Is... Read more »

The Domain Name System (DNS) keeps the Internet running. On today’s N Is For Networking podcast, we talk about how DNS transforms human-readable host names into IP addresses so that Internet traffic can be sent to the right place. We talk about root name servers, Top Level Domains (TLDs), and other elements of the DNS... Read more »

Following last week’s introduction to network monitoring, we discuss the Simple Network Management Protocol (SNMP), one of the most implemented types of network monitoring. We discuss how it is organized, operations that SNMP can perform, and versions of SNMP. This week’s bonus conversation is a discussion on the future for SNMP. Episode Links: MIB tree... Read more »

How do you know what is happening within your network, especially when something isn’t working? Network monitoring is the answer. On today’s show, we’ll start with the basics of network monitoring. We’ll cover what it is, how it’s used, and suggest some paid and open source network monitoring tools. This week’s bonus material is a... Read more »

In this discussion, hosts dive into the value of certifications in the networking field. They explore whether certifications truly aid in landing jobs and their real-world applicability. Hands-on experience is emphasized as vital, with lab work encouraged to deepen understanding. The differing perspectives on certification levels and their employer perceptions are analyzed. They also touch on financing options for certifications and the challenges of remote testing, ultimately reinforcing the need for a balance between certs and practical experience.

In today’s episode, we continue the discussion about routing and routing protocols by focusing on commonalities rather than differences among  protocols such as OSPF, RIP, EIGRP, or BGP. We explain how, in general, routing protocols discover each other, communicate, maintain relationships, and exchange routing information. Next, we explore the topics of selecting best paths in... Read more »

Ready for more routing and routing protocols? Today we discuss the roles of the network operating system (NOS), routing protocols, the Routing Information Base (RIB), and the Forwarding Information Base (FIB). We also include the dynamics of routing protocols, the importance of hardware like TCAM for performance, and the concept of administrative distance or route... Read more »

Dive into the essentials of layer 3 routing and unlock the mysteries of routers and routing tables. Explore the evolution of IP and the hurdles of new technologies. Learn how routers direct packets and the vital role subnetting plays. Discover the differences between static and default routes, plus the power of dynamic protocols like BGP and OSPF. Engage with practical Wireshark exercises and unravel the connections between packets and frames for a deeper networking understanding.

The line between switches and routers can get a little blurry. On today’s N Is For Networking, we try to clear things up. We start by defining what a router and switch are, and then provide some historical and technical context to better understand the differences. Then we discuss how modern switches have evolved to... Read more »

Delve into the fascinating world of spanning tree protocols as versions like 802.1D, 802.1w, and 802.1s are explored. Learn about the critical importance of BPDU guard in preventing network loops. The discussion covers the impact of switch port states on DHCP functionality and the significance of edge ports for maintaining connectivity. With insights into network design and stability, the conversation wraps up by highlighting modern technologies that enhance network efficiency. Join the journey of collaborative learning and skill development in networking!