Network+ N10-009 · Objective 1.7 · IPv4/CIDR/VLSM · Solo
Subnet Architect
Detect a subnet, then design an address plan. Verify your reasoning, not just a familiar-looking answer. IPv4 with conventional network/broadcast reservations; no /31 or /32 rules in this release.
Choose your practice
Guided Practice includes formulas and coaching without a timer. Challenge asks you to solve independently; optional hints remain available. Each correct step earns 100 once, or 75 with an explicit hint. First attempts, retries, hint use and completion stay separate; points do not establish mastery.
Ten readable exercise headers were independently calculated. Ambiguous image strips are excluded and documented. Source IPs are arithmetic exercises, not allocations you may use on a production network. A transfer follows completion.
Only the latest solo run is saved in this browser’s localStorage when available. No account, timer, multiplayer scoring or analytics. Reset clears this game’s saved run; Outage Ops and other progress are unaffected.