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MSTP Explained: Multiple Spanning Tree Protocol Guide
Multiple Spanning Tree Protocol (MSTP) maps groups of VLANs to a small number of spanning tree instances. You get RSTP-speed convergence, per-instance load balancing, and a fraction of the CPU overhead that PVST+ burns through at scale. If your network has 100+ VLANs running PVST+, you’ve got 100+ concurrent STP instances on every switch....
Per VLAN Spanning Tree (PVST) Explained: The CCNA Guide
Per VLAN Spanning Tree (PVST) is a Cisco-proprietary protocol that runs a separate instance of the Spanning Tree Protocol for every VLAN on a switch. Each VLAN gets its own root bridge, its own loop-free topology, and its own set of blocked ports. That’s the whole idea, and it’s why Cisco switches ship with...
Application-Aware Routing in SD-WAN: How It Works (2026)
Your video call just froze. Again. Here’s the frustrating part. You’ve got three WAN links right there. But your router keeps shoving all traffic down the same MPLS tunnel. It’s like a highway with two empty lanes next to a traffic jam. That’s the problem application-aware routing solves. Application-aware routing (AAR) is the SD-WAN...
Proxmox Homelab: Complete Setup from Bare Metal to First VM
A proxmox homelab turns one old computer into a private virtualization lab you can learn on, break, and rebuild whenever you want. You install Proxmox VE on bare-metal hardware, open a web browser, and create your first virtual machine from a graphical wizard. That’s the whole workflow, and the total build time usually runs...
Proxmox vs Docker in 2026: VMs vs Containers, When to Use Which
Proxmox and Docker don’t compete. They work at different layers of your infrastructure stack. Proxmox VE is a hypervisor. It runs on bare metal and manages virtual machines and LXC containers on your physical hardware. Docker is an application runtime. It packages apps with their dependencies and runs them as containers inside an operating...
DevOps Interview Questions: The Honest 2026 Guide (180+ Questions Inside)
I’ve sat on both sides of a DevOps interview. As a candidate sweating through a whiteboard rollback scenario, and later as the person asking the questions. Here’s the part nobody tells you: most DevOps interviews aren’t really about tools. They’re about how you think when a deploy breaks at 2 AM and Slack won’t...
AWS CloudOps Engineer Exam Prep: Practice Questions and Study Guide
$135,000 to $147,000 a year. That’s what AWS CloudOps Engineers are pulling in right now, on average. Top earners? Over $218K. But here’s the thing. You’ve got to pass the exam first. Chasing a shortcut for the SOA-C03? Understandable. The exam is tough. But leaked question files are unreliable, they breach the AWS Certification...
Network Engineer Roadmap 2026: The 18-Month Plan, Month by Month
A month-by-month network engineer roadmap with real exam costs, the two job titles BLS says are moving in opposite directions, and a printable PDF...
Fortinet NSE4 Exam Cost in 2026: Fees, Study Resources, and What to Expect
$200. That’s what Fortinet charges for the NSE 4 exam in 2026. Most of the web still says $400. That number is old, and it’s the single biggest source of confusion on this topic. Fortinet’s own training helpdesk lists NSE 4 through NSE 6 exams at $200 each, and that price holds through the...
Network Automation Engineer Salary 2026: Skills, Tools & Pay Guide
A network automation engineer in the US earns between $109,000 and $128,000 per year on average, with senior professionals pulling in $160,000 or more. That’s roughly 15-30% higher than what traditional network engineers make at the same experience level. This connects directly to AI prompts for network engineering work. Not bad for a role...
