Memorizing Block Sizes

Lammle's book has really given me the best insight into subnetting. I see it's key to know your block sizes and to be able to increment them.

He makes a remark about knowing how to count by 16's. Does everyone really know how to count by 16's, 32's, 64's, and 128's?

I can't memorize counting by these blocks all the way up to 255! ...or can I?

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Comments

dynamik

I didn't memorize them because I found it's pretty simple to add in 16, 32, etc. increments. I can get anywhere I need to within a few seconds, so it's not a big deal.

blackninja

it2b wrote: »

Lammle's book has really given me the best insight into subnetting. I see it's key to know your block sizes and to be able to increment them.

He makes a remark about knowing how to count by 16's. Does everyone really know how to count by 16's, 32's, 64's, and 128's?

I can't memorize counting by these blocks all the way up to 255! ...or can I?

Keep practicing subnetting on paper and you'll soon discover that it will just click.

Then when you see the subnet, say 255.255.255.240 you'll think straight away blocks of 16, then look at the address of 192.168.1.67 and say that belongs to 192.168.1.64 /28.

Just stick with it.

networker050184

dynamik wrote: »

I didn't memorize them because I found it's pretty simple to add in 16, 32, etc. increments. I can get anywhere I need to within a few seconds, so it's not a big deal.

Same here.

jonny72

Always surprises me a bit when people have problems getting their head round binary, as its second nature to me now - a result of working in IT for years.

Give it time and you'll be amazed how quickly you can work things out that at first seemed like rocket science.

PC509

I remember my dad teaching my about binary long ago, and then I learned it from there. I used it with programming and playing with electronics, though, not for subnetting. Although, it does work no matter what. 1's and 0's.... And the 1,2,4,8,16,32,64..... I've learned from PC's and memory (damn upgrades!). My kids are amazed at it, that I can double the numbers everytime. His teacher loved it, too!

up2thetime

blackninja wrote: »

Keep practicing subnetting on paper and you'll soon discover that it will just click.

Completely agree.

That's the way I did it.

I used to write it out line by line.

Bl8ckr0uter

it2b wrote: »

Lammle's book has really given me the best insight into subnetting. I see it's key to know your block sizes and to be able to increment them.

He makes a remark about knowing how to count by 16's. Does everyone really know how to count by 16's, 32's, 64's, and 128's?

I can't memorize counting by these blocks all the way up to 255! ...or can I?

Honestly I saw the 1's and 0's in my head one night (after studying subnetting for a few days) and it just stuck. I had a Neo towards the end of Matrix 1 moment and I just saw the code. You will have the same thing happen for you. Just study hard.