# Subnetting Speed Practice 2

Just like last Friday’s post, here’s more Subnetting speed practice. But since no one told me how long it’s taking, I’ve added a poll. You can answer the poll based on this week’s questions, last week’s, or any other week.

Suggestions BEFORE CLICKING to see the rest: be ready to start your timer. Be ready to finishÂ all 5 problems.

1. List the number of network, subnet, and host bits
2. List the number of hosts addresses in the subnet

1) 10.1.1.1/23

2) 172.16.203.203/25

3) 192.168.1.161/29

4) 10.1.99.101/26

5) 172.16.77.177/27

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May 31, 2011 12:47 pm

[…] May This post makes no sense withoutÂ reading this post first. The earlier post lists 5 subnetting problems, and tells you to time yourself. The answers are […]

Dave
August 5, 2013 10:26 pm

7:05 :\

Hussein
September 17, 2013 2:39 pm

3:48 !

D64
April 9, 2018 5:33 pm

for all 5 ?! That’s amazing !
I want to see or know your technique

lyjo
September 18, 2013 10:29 am

All right! Making progress…

May 16, 2017 7:39 pm

4min 45sec

Peter
June 2, 2017 3:28 pm

Is fast typing/writing a part of this? I can do these exercises almost as fast as I can write (with maybe 5-10 seconds to think for each IP address), but I still can’t get under 8 minutes. Do I need to practice writing the solution to one exercise while we mentally solve the next?

lyjo
June 6, 2017 9:48 am

Peter,
It’s about the thinking time. In your example, if you think for 10 seconds, and then N more to write it, I’m ok with counting it as 10 seconds. The exam will not require you to type the answers even – you’ll think the answer, use it to answer a more in depth question, or click a multi guess answer.

CiscoNeophyte
December 13, 2018 12:58 pm

I must be dumb as a rock! For this particular set of 5 questions it took me 13min 54sec to do all 5 of them.

Rounding up to 14min and dividing that time by 5 gives me 2.8min each

Are people saying they are doing all 5 questions in 5min or less? If so, I’m doing something very wrong and will never pass this test

lyjo
December 13, 2018 1:14 pm

Hey Neophyte,
Take a breath! You’ll get there. You just need to practice. I liken it to the idea that if you put together a piece of furniture from Ikea or an office store, it might take a while, and you might not even feel like you did it right. But if you di 30-40 builds as a contractor to the store, you’d be able to do it well, fast, without referencing the instructions. That’s the goal. Seriously, many people have gotten their speed down to a minute or less for each of these kinds of exercises. (If you have my books, check out part 4 of the ICND1 Cert Guide – that’s where it shows the process, and tells you about where to practice.) Hope this helps…
Wendell

JackB
June 12, 2019 5:25 am

Hi,
It took me 3 min 2s. But I didn’t write whole addresses, just the changing octets. For example (Ad.1): .0.0 – .1.255; 0.1, 1.254; N8, S15, H9 – 510.
Thank you Wendell for great examples and practise excersises from your book ðŸ™‚

JackB