Subnetting Sprint
Sixty seconds. You get an IP and a prefix — call the network address, broadcast address, usable hosts or subnet mask. Every wrong answer shows you the working, so a bad round is still practice.
How to get faster
Stop dividing by 2 in your head. Learn the block size shortcut: for a /26 the block is 64, so networks land on 0, 64, 128, 192. The network address is the block boundary at or below your IP, and the broadcast is the next boundary minus one. Once block sizes are automatic, most questions become a single subtraction.
Full method: subnetting explained · how to subnet fast · check your answer in the calculator.
More games
Subnet Mask Match
Turn any /prefix into its dotted-decimal mask, fast.
Play →60 secondsPort Number Rush
Match services to their well-known TCP/UDP ports.
Play →Speed is practice. Skill is the rack.
These drills build the recall speed the CCNA exam demands. The job demands more — configuring real routers and switches until it is second nature. That is what we teach in Ahmedabad, on real Cisco hardware.