S3SS10N Wednesday – Implementing Custom Subnet Masks

Join Cybrary

Begin Learning Cyber Security for FREE Now!

Already a Member Login Here
< Back to S3SS10NS

S3SS10N Wednesday – Implementing Custom Subnet Masks

Published: August 15, 2016 | By: Kelly Handerhan | Views: 5680
This post has been saved to your profile

This Weeks S3SS10N Wednesday

This session covers implementing custom subnet masks and offers participants a quick and efficient shortcut to achieve this. By assigning a number, you subtract to get an increment which shows the network broken down into numerical increments. You can use this to discover the lowest value for an IP address. Essentially, we use the default subnet number to determine how many octets are needed to create the subnet mask. With a Class A or Class B address, this is pretty straightforward. However, with a class C a little more work is involved. To make sub netting easier, it is helpful to first understand decimal to binary.

< Back to S3SS10NS

About This S3SS10N Wednesday's Contributor

Kelly Handerhan
Skilled and certified in CISSP, CASP, and PMP, SME Kelly has taught several courses on Cybrary and is highly praised for her ability to effectively communicate important information in a relate-able and understandable way.
Enjoy this S3SS10N Wednesday? Want more Cybytes?
Invite a Friend
and share now
Facebook Twitter LinkedIn Email
Join Cybrary
  1. when you steal 4 bits it means 248 i miss something wrong i need more explanation please

  2. Sub-netting was always one of those black boxes that only the network guys knew. I’m a Windows server guy, working along side network guys for many years, and even they often had these big, multi-page charts laying out subnet ranges.

    This made all that obsolete. Incredibly easy way to figure out subnets, and as I’m working on my CCNA right now, incredibly valuable to me.

    Thanks Kelly

Page 2 of 2«12
Comment on This

You must be logged in to post a comment.

Our Revolution

We believe Cyber Security training should accessible for everyone, everywhere. Everyone deserves the OPPORTUNITY to learn, begin and grow a career in this fascinating field. Therefore, Cybrary is the world's largest community where people, companies and training come together to give everyone the ability to collaborate in an open source way that is revolutionizing the cyber security educational experience.

We recommend always using caution when following any link

Are you sure you want to continue?