N Is For Networking

Russ White, a network architect and author known for his expertise in network models, joins the discussion to unpack the significance of frameworks like OSI. He explains how these models enhance engineers' problem-solving capabilities. The conversation shifts to the RINA model, challenging the relevance of traditional models in modern networking. White also emphasizes the importance of learning from failures, sharing insightful anecdotes about growth through challenges. Ultimately, he champions personalized approaches to network modeling.

In today’s episode, we address listener Kieren’s question about the differences between LAG, MLAG, MC-LAG, and stacking. We tackle the nuances of Link Aggregation (LAG) and the Link Aggregation Control Protocol (LACP), and explain their roles in redundancy and bandwidth efficiency. We also discuss the complexities and differences among vendors and overall benefits of Multi-Chassis... Read more »

It’s history day on N Is For Networking! We learn about the development of IPv6 directly from Bob Hinden, one of the pioneers who made it happen. Bob discusses his journey from early work on ARPANET to his significant contributions to IPv6. We also cover the transition from IPv4, the challenges faced during IPv6’s creation,... Read more »

Explore the intriguing world of high-speed Ethernet lanes! Discover what 'lanes' really mean and how they differ from Wi-Fi channelization. Learn why multiple lanes are crucial for achieving speeds like 40Gb and 100Gb, as single lanes can't handle full bandwidth. Delve into the physical aspects of cables and how breakout cables can boost connectivity. Lastly, see how LACP differs from Ethernet lanes and what it means for data transfer reliability and speed. A deep dive into the nuts and bolts of modern networking!

Today’s topic is the default gateway, essential for routing traffic between networks. We explain its purpose, configuration, and the consequences of incorrect settings. Using home networks as an example, Ethan and Holly illustrate how default gateways enable devices to communicate with external networks. The discussion also covers routing tables, subnet masks, and the differences between... Read more »

When building your network and buying equipment, is performance or cost more important? On today’s episode, we discuss the balance between performance and cost in selecting networking equipment. We also cover other considerations, including why you should understand client and network needs, the fluid nature of pricing, and the necessity of creative problem-solving. Bonus material: ... Read more »

Discover the essentials of packet analysis for tackling network issues. Learn how tools like Wireshark decode data and the role of Tcpdump in comparative analysis. Explore methods for capturing traffic through switch ports and the importance of filtering excess data. Understand how to trace performance issues and verify delivery with timestamps. The hosts share real-world examples of diagnosing slowness, emphasizing the need to monitor the entire application stack. Plus, get tips on training resources to boost your packet analysis skills!

Network engineers should be familiar with the Open Systems Interconnection (OSI) model, a framework for understanding network communications. On today’s show, Ethan and Holly delve into each of the model’s seven layers to discuss their functions, associated protocols, and practical implications for modern networking. They also talk about how the OSI model is, in fact,... Read more »

What are the most essential topics to understand for a new networkers? Ethan Banks and Holly Metlitzky address a listener’s question about foundational topics, covering what a network is, the differences between packet-switched and circuit-switched networks, and the nature of the internet as a “network of networks.” They discuss the importance of Internet Protocol (IP),... Read more »

Today we explore Virtual Local Area Networks (VLANs). This topic was prompted by a question from college student Douglas. We’ll explain the fundamental concepts of VLANs, such as their role in segmenting and managing network traffic, and the technical details for implementation. We’ll also address key topics including VLAN tags, access and trunk ports, and... Read more »