Subnetting Practice Questions: 50 Problems With Worked Solutions
50 free subnetting practice questions with full worked solutions, not just answers. Covers masks, network and broadcast, VLSM, summarisation, and...
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...
Network+ Practice Test 2026: 200+ N10-009 Questions With Explained Answers
Free Network+ practice test built for N10-009 only. 40 exam-style questions with explained answers across all 5 domains, plus a 200+ question...
VLAN vs Subnet: What’s the Difference? (2026 Guide with Diagram)
A VLAN and a subnet are not the same thing, and most people mix them up because in a healthy network they almost always show up together. Here’s the short version. A VLAN is a Layer 2 concept. It splits a physical switch into separate broadcast domains. A subnet is a Layer 3 concept....
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?
Pick the right format in 30 seconds with our decision table. Covers USB drives, external SSDs, bootable USB, Mac plus Windows, and the 4 GB limit...
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...
