Create a Subnetting Cheat Sheet

Lessons Discussion
1

This topic is to discuss the following lesson:

https://networklessons.com/subnetting/create-a-subnetting-cheat-sheet/

2

Hi Rene,

Cheat Sheet Table under Step 4 and Step 5 needs some correction. Please revisit and correct , it will be very useful for all of us.

Thanks ,

SV

 

3

Hi SV,

Thanks, I just fixed a few errors. If you encounter any, please let me know and I’ll correct them.

Rene

4

Another easy way to get the wildcard value is to subtract the value in each octet in the subnet mask from 255.

Example: 255.255.248.0 subnet mask

1st Octet: 255 - 255 = 0

2nd Octet 255 - 255 =0

3rd Octet 255 - 248 = 7

4th Octent 255 - 0 = 255

Giving a wildcard mask of 0.0.7.255

 

5

Hi Rene,

It looks like /25 - /30 were not written in the 4’th octet. That is where the masks should be written, correct?

Thank you,

Kenny

6

Hi Kenny,

Ah I see it now…that’s a copy/paste error, sorry for the inconvenience. It’s fixed now!

Rene

7

Hi Rene,
Are you going to talk about Wild Card and Access-List ?

Thanks,

Hoang Trinh

8

not possible to write all that in the very small whiteboard they will give at the exam. Except when you write it directly on the desk…

1 Like
9

and it misses step 1 bis :slight_smile:
after writ down 8 bits, calculate these :
255-1 = 254
254-2 = 252
252-4 = 248
248-8 = 240
240-16 = 224
224-32= 192
192-64 = 128
128-128 = 0

1 Like
10

This is a bit of a silly question… I’m having the ICND1 exam in 10 days so I have no experience with Cisco exams yet. Do they actually allow this, the creation of the cheat sheet? I thought that you can’t use anything when sitting there?

11

Hello Marit

When you go to write the exam, you are given a laminated A4 or letter sized card and a whiteboard marker. After you take a seat at the exam, you can write anything you like on that before or during your exam. It’s there for notes, calculations, or even a motivational quote if you like :stuck_out_tongue_winking_eye:. So if you remember the logic of the “cheat sheet” you are free two write it down before you begin.

I hope this has been helpful!

Laz

1 Like
12

That is really good to know, I’ll go practice a bit more on the cheat sheet :wink: Thanks!

1 Like
13

That’s brilliant! So much simpler :clap:

1 Like
14

Hi Rene,

If im doing the CCNA exam remotely (at home) on my own laptop, you can only use the “notepad” provided as part of the exam during the exam to write the cheat sheet on. Is this correct? Rules are different to when you to take the exam in person at a venue and you are given a a4/card as opposed to taking the exam remotely. Correct me if im wrong here.

Thanks.

15

Hello Irfan

According to the FAQ found at Cisco’s OnVUE online proctored exam web page, no scratch paper or note boards are allowed during an OnVUE online exam. For this reason, a built-in digital whiteboard can be used for scratch work or note-taking during an exam. Here is a practice whiteboard that’s available to see what it’s like:

https://home.pearsonvue.com/onvue/whiteboard

You can actually type as well, so if it’s challenging to take notes with the mouse, you can write out your subnetting cheat sheet by typing it out.

I hope this has been helpful!

Laz