Subnetting Question

To all of you who have taken the Security+ exam,

Has anyone actually received a question on subnetting? As in calculations on the number of hosts with a given subnet mask?

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Comments

-hype

Nope.

No subnetting questions.

loun80

Thanks!

-hype

Make sure you have mastered Cryptography and also remember the abbreviations!! They abbreviate everything!!!

Good Luck!!

Baack

No sub netting questions
Mostly problem solving questions
After taking the test I can see why they suggest 2 years experience

Good luck!!!

loun80

Cryptography is my biggest weakness. I thought it was only worth 11%.

Darril

I sincerely doubt you'll see a question that requires you to calculate the number of hosts. However, you might see a question related to subnetting and availability. It seems to be rare, but is possible.

Specifically, if a computer is assigned an IP address with the wrong network ID, it won't be available on the network. Here's a simple example without subnetting:

A network has a default gateway of 192.168.1.1/24. Of the following choices, what IP address is NOT valid in this network?

A. 192.168.1.110
B. 192.168.11.11
C. 192.168.1.111
D. 192.168.1.113

The default gateway has a network ID of 192.168.1.0/24 and answers A, C, and D all have a network ID of 192.168.1.0/24. B has a network ID of 192.168.11.0/24 and will not operate on this network.

Similarly, which two of the following IPs are on the same subnet?
192.168.1.50/26
192.168.1.100/26
192.168.1.165/26
192.168.1.189/26

To answer this correctly, you need to understand subnetting even if you don't need to calculate the number of hosts on the subnet.

Darril

loun80 wrote: »

Cryptography is my biggest weakness. I thought it was only worth 11%.

Actually, you're correct that is only worth 11%. However, if you every cryptography question looks foreign, it seems like you're getting more than just 11% of the questions related to cryptography.

The good news is that you don't have to know cryptography in-depth.

Good luck.