Free exam-focused coverage of networking concepts, operations, security, and troubleshooting for CompTIA Network+.
This section targets the current CompTIA Network+ exam series N10-009, which CompTIA identifies as version V9. Network+ is not just a ports-and-cables exam: it rewards fast layer selection, accurate use of subnetting and VLAN logic, and choosing the right tool before escalating to larger infrastructure changes. That is why these pages stay centered on what changed, which layer owns the symptom, and which check gives you the strongest signal with the least wasted motion.
Use the cheat sheet for fast recall of ports, protocols, subnetting, Wi-Fi, VLANs, and troubleshooting flow. Use the FAQ when you want more context around PBQs, current exam format, and common mistakes, and keep the resources page open when you need the official exam details, RFCs, or safe lab tooling.