Learn the whole stack
Videos, an interactive L1–L7 stack explorer, and curated resources for networking, observability, security, automation, and computer science fundamentals.
Original tutorials and field notes — companion videos to the blog
Original content in production — read the companion articles while videos launch. Subscribe: @alexlux on YouTube
How I subnet on every ticket — powers of two, block sizes, and the one question that answers 90% of them
Live-style walk through the OSI model with real failure signatures and the commands I reach for first
Deploy the SNMP collector, verify devices in New Relic, and build your first interface utilization dashboard
Reading uplink loss/latency, AutoVPN status, and exporting telemetry to your observability platform
Learn the basics of TCP/IP, HTTP, and other essential protocols
Master subnetting with practical examples and exercises
Configure and troubleshoot VLANs in enterprise networks
The seven layers walked through end to end — the mental model behind every troubleshooting session
An animated tour of encapsulation from application data down to bits on the wire
Comprehensive Security+ certification preparation
Implementing security measures in network infrastructure
Introduction to AWS, Azure, and cloud architectures
Automating infrastructure with Terraform and Ansible
Metrics, logs, and traces — the three pillars and why network teams need them too
How SNMP polling works — OIDs, MIBs, traps, and what your monitoring tool actually sees
Never trust, always verify — the model behind Zscaler, ZPA, and modern access control
Secure Access Service Edge — converging SD-WAN and cloud security into one architecture
Full CS course — arrays, linked lists, trees, graphs, and the complexity behind them
The classic first course — algorithms, memory, data structures, and how computers actually work
Big-O, sorting, searching, and the CS fundamentals under every protocol stack
Subnets, route tables, internet gateways, and security groups — the L3 building blocks in AWS
Transit Gateway, Direct Connect, and hybrid connectivity patterns for enterprise VPCs
Infrastructure as code in a nutshell — providers, state, and why network engineers should care
Playbooks, inventory, and modules for configuring routers and switches at scale