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BGP vs OSPF: When to Use Which Protocol (2026 Guide)
TL;DR: Use OSPF inside your own network for fast, automatic routing between your routers. Use BGP when connecting to the Internet, peering with another company, or running a large-scale data centre fabric. OSPF is an Interior Gateway Protocol (IGP). BGP is an Exterior Gateway Protocol (EGP). They solve different problems, and most serious networks...
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. If you’re searching for aws cloudops engineer dumps, you’re probably stressed about the SOA-C03 and looking for a shortcut. We get it....
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 NSE4 exam in 2026. But that number changed recently, and most people online are still quoting the old price. Fortinet restructured their entire certification programme in October 2025, and pricing dropped from $400 to $200 per exam. The catch? You now need two exams instead of one...
