Single Mode vs Multimode Fiber: Full Comparison
A team once ran 2km of multimode fibre between two buildings. The link never came up clean. They blamed the switches, the transceivers, even the weather. The real problem? Wrong fibre. Multimode dies long before 2km, and no amount of swapping optics fixes a physics limit. That single mistake cost them a weekend and...
CCNA Practice Test 2026: 200+ Questions With Explained Answers
Roughly one in five candidates fails the CCNA on their first try. Not because the material is impossible. Because they walked in having read about networking instead of having answered questions under a ticking clock. That’s the gap this CCNA practice test 2026 is built to close. You’ve studied the theory. You can explain...
Expedited Forwarding (EF) Explained: The DSCP 46 Guide Every Network Engineer Needs
Your VoIP deployment just went live. The routers are up, routing tables are clean, and the WAN links have plenty of headroom. But calls are choppy. Jitter is spiking. Users are already filing tickets. You’ve probably seen this. Or you will. QoS is one of those topics that makes sense when you read about...
CCNA v2.0: What Exam Topics Changed (Feb 2027 Deadline)
28% of CCNA v2.0 exam topics now require you to troubleshoot a problem. In v1.1, that number was zero. That single change rewrites how you need to prepare. Cisco announced the v2.0 blueprint on May 20, 2026. V1.1 retires February 2, 2027 – roughly eight months of runway. If you’re currently studying, or deciding...
Cat6 vs Cat6e vs Cat7: Complete Cable Comparison Guide
Cat6e isn’t a real standard. Most Cat7 cable you’ll find online isn’t compliant Cat7 either. That’s not a hot take. It’s what the test data shows when a Fluke field certifier gets plugged in. And it’s why so many network students, homeowners, and small business owners end up confused when they try to research...
exFAT vs NTFS vs FAT32: Which File System Should You Pick in 2026?
The short answer: use NTFS for Windows-only drives, exFAT for drives shared between Windows and Mac, and FAT32 only for older devices that don’t support exFAT. If you’re formatting a USB drive or external SSD in 2026, most people should choose exFAT for cross-platform use and NTFS for Windows-only storage. FAT32 is only worth...
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...
How to Become a Network Engineer in 2026: Skills, Certs, and Career Roadmap
$109,040. That’s the average network engineer salary in the United States right now. Senior engineers with a CCIE? They’re pulling $166K and up. So how do you get there? Here’s the short answer. You need a mix of technical skills, at least one solid certification, and some hands-on experience. A degree helps, but it...
