What is the dimension of IP subnets (for dummies)?


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LV the fourth day of rampant and POPs up messages like "Oh my God, they block even subnet /10!"

What it means /10, /24, /n, ... ?
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/10 - the abbreviated writing of the mask.
Mask length can be from 0 to 32 bits.
The greater the length of the mask - the smaller the leaf nodes included in the network.
Accordingly, panicking all because of the fact that RCN is blocking a very large network indiscriminately (/10 - 4194304 Hosts).

Read more about masks - https://ru.wikipedia.org/wiki/%D0%9C%D0%B0%D1%81%D...
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/10 - length subnet mask.
Here's the picture /23 example:
RRhqmC.png
© wiki: subnet Mask

Excerpt from the same article:
/32 is one address
/31 is two addresses
...
/24 is 256 addresses
/25 is 512
...
/10 is a 4 194 304 addresses
/0 - all ipv4 addresses

That is, when the lock /10 along with several addresses of the cart ILV blocked more than four MILLION "neighbors"
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The dimension is the total number of possible addresses. /10 is the number of non-changing bits. The address is 32 bits or 4 bytes to 4 numbers from 0 to 255. 24-bit, not changing, means that only changes 32-24=8 , which is equivalent to 255 addresses - 192.168.0.0/24 - it addresses 192.168.0.0 to 192.168.0.255 .
32 - 10 = 22 bits is 2^22 = 4194304 addresses (enough for some sort of average of the country)
the figure is very high - hence the outrage.
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here is a good article about IP addresses: https://habr.com/post/350878/
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