So how fast and accurate are YOU? (Subnetting)

in CCNA & CCENT
I'm studying/training for CCENT. I've been trying to improve my subnetting, and today was my first actual subnetting training session. I used subnettingquestions.com - Free Subnetting Questions and Answers Randomly Generated Online and gave myself 10 minutes to rush as many problems as I could without pen and paper. I did 6 sessions of 10 minute blocks--the results are below.
I don't see how people can take 10-15 seconds per problem and get everything correct. I mean, I'm sure it's possible, but I'm definitely not there.
Anyway, any input/advice is welcome. Also, it would be interesting to see some hard numbers from other TE members! Especially those who have passed any Cisco Exams.
Thanks for reading.
I don't see how people can take 10-15 seconds per problem and get everything correct. I mean, I'm sure it's possible, but I'm definitely not there.
Anyway, any input/advice is welcome. Also, it would be interesting to see some hard numbers from other TE members! Especially those who have passed any Cisco Exams.
Thanks for reading.

WGU B.S. Information Technology (Completed January 2013)
Comments
You dont have to get subnetting correct inside 15 seconds in the field. Im quick, but I find in the field I dont need to be. If Im designing a schema I will take my time over it. If Im working with a schema, its generally laid out for me what I have to do.
I find that an annoying byproduct of all CCNA materials encouraging students to be able to 'subnet in under 15 seconds' is that it just doesn't translate into the real world and that it encourages speed rather than quality. This is not a reflection of the OP or anyone else on TE, it's just an observation. We let our junior/graduate engineers design the schema for some of the smaller branches which my team reviews and I'd say there are errors in about 1 in 5 of the proposals. It's all well and good to be quick at subnetting but I can guarantee that no employer ever goes "that guy can subnet in 11 seconds, hire him now!".
Exactly. Commercial reasons will decide how many sites and what have you. This takes time to bottom out. Plenty of time to figure out your IP schema. Takes time for the equipment to be decided upon, ordered and on site anyway!
The timegame is somewhat artificial and designed to focus minds in an exam.
Ok. Well first of all execs dont know what a subnet is. But you are right, a capable network professional should know the difference between a /24 or a /23 or a /25. They should also know what ip subnet-zero or ip classless means on a router, or what auto-summary does on a routing process. But most situations in the field are about point to point connectivity and resolving issues therein as opposed to being able to decide what schema you need for an entire network inside 15 seconds dependent on number of networks and number of hosts required.
My main point was that you should be able to quickly subnet a /23 and beyond subnet very quickly and you should also (as Turgon stated) know how to work with point-to-point networks quickly. I had a couple of CCNA practice questions where the answer was that the addresses on a P2P network were wrong and I felt like a fool when I wasted time and did not quickly see this.
I would compare subnetting to your multiplication tables - speed and accuracy will help you with everything else you do beyond that level. If you waste a lot of time on a Calculus problem because you cannot quickly figure out what 9 times 12 or 7 times 6 is, then you will struggle overall with Calculus on tests where time is an issue...
and valleycolleges website.
I test myself to subnet non stop without making errors for 10 minutes worth of questions. If I make an error my clock starts again. I also have upped the game by listening to an audio book at the same time and i try to think as little as possible while subnetting and focus more on the audio book. It really does work. It's like my brain is working in the background on the question.
Pretty nice, any chance you can share the spreadsheet?