Certification exam - Subnetting?

nb-

Hi

Been doing alot of CCNA practice exams recently, and everytime i hit these subnet questions like.. Which subnetwork does xxx belong to? or which of the following are not apart of the network bla bla bla..

I can complete them, but it takes some time. What i'm thinking of is whether your allowed to use pen and paper at the certification examn for these questions. My math skills are horrible, and i'm strugling a little with remembering everything while calculating it.

Are you allowed pen and paper at the cert exams? Do they provide you with it or can you bring your own? Do you have to calculate it in your head, or are you allowed a regular calculator?

Nytrocide

As far as I know they provide you with a laminated sheet and a marker (easy erase).

Hatch1921

Same here..... laminate sheet and a dry erase marker.

Node Man

subnetting is crucial. also the subnetting can be imbedded into a larger question. pratice practice pratice! In time you will start to memorize the math. For example, you will remember that a mask of 255.255.254.0 has 510 hosts.

iamme4eva

Yeah, they have to give you a laminated sheet of paper and pen.

www.subnettingquestions.com - just sit and do them until you get faster. It's just practice.

danstar

Just the same thing with me. I am so weak in Maths. Bit it all has to do with determination. I have chose to battle it this month, maybe next month as I wanna have my CCNA cert next month. And I get to hear sub-netting is not that hard, it just takes lots of practice and you can do it in your head without having to use a paper for calculations when you're glued to it.

Prog Snob

Nytrocide wrote: »

As far as I know they provide you with a laminated sheet and a marker (easy erase).

yes, but nothing to wipe it with. i had to use my hand.

iamme4eva

Ha! You write too much then!

Just be persistent, you'll get quicker. If the method you are using confuses you, find another. There are several good, reliable methods of subnetting, one is bound to "click" in your mind.

And when you're done with the exam, get an app for your smart phone!!!

CDubbs89

Just curious what app do you use for the phone.

Michael2

There won't be any really complicated subnetting questions on the ICND1. Cisco just wants to make sure you know how to use their equipment. Nobody expects you to subnet a network at lightning speeds. They'll just ask you things like "What is the network number of this IP address?" or "What is the third range of this network?"

iamme4eva

CDubbs89: An android app called IPCalc. Errr, I mean, I do it all in my head or use a pen and paper? I would never use my phone! . I use my phone at work sometimes when I'm being lazy. I never use it when I'm studying.

Michael2: It's not complicated once you've mastered it, but I remember finding it pretty daunting when I first learnt subnetting. And while you don't need to do it at lightning speed, the quicker you are the more time you have to spend on other questions where you may need it. There are a lot of questions on both ICND 1 and ICND 2 that indirectly involve subnetting, even if they aren't directly subnetting related. It's an unnecessary pressure on yourself if you go in the exam not too hot with your subnetting, for the sake of an extra weeks study.

danstar

I think I'll have to kill subnetting then. I'll try and find some videos on youtube about it.. and work it out

jamthat

http://www.techexams.net/forums/ccna-ccent/38772-subnetting-made-easy.html

This is what made it click for me. I can solve all the problems now, just need to work on my speed/memorization a bit.

kohr-ah

I always remembered it a wierd way when I took the CCNA for at least knowing what ranges it came between.
If a subnet mask I'd subtract it from 256 if a wildcard mask subtract from a broadcast (255.255.255.255).

Ex: Where does 192.168.1.53 fall on 255.255.255.240
I'd subtract the 240 from 256 and go ok.. 16. So it goes in incriments of 16.
192.168.1.0
192.168.1.16
192.168.1.32
192.168.1.48
192.168.1.64
etc etc etc

what about 255.255.248.0
Ok well subtract 248 from 256 i get 8
so it goes in incriments like
x.x.8.0
x.x.16.0
x.x.24.0

or what is the wildcard mask for 172.16.22.16 255.255.240.0
subtract 255.255.240.0 from 255.255.255.255 and I got 0.0.15.255

:P

Then all you need to learn was remembering what /24,/25,/26 stood for etc.