问题描述
假设我有136.181.0.0 / 16而且我想把它分成11个子网
lets say I have 136.181.0.0 /16 and I want to divide it into eleven subnets
我得到/ 19？首先它是/ 16只有1个子网（实际上当尚未应用子网时，它仍称为网络地址）。从主机位借位1位，你得到/ 17有两个子网。借用另一个，然后你将获得4个子网和18的前缀。借用另一个位然后你获得8个子网，其中/ 19作为CIDR。
I got /19? First it was /16 which has only 1 subnet (actually when subnetting is not yet applied, it is still called Network Address). Borrow 1 bit from the host bits, you get /17 with two subnets. Borrow another one then you'll get 4 subnets and a prefix of 18. Borrow another bit then you get 8 subnets with /19 as the CIDR.
不确定第9个，10日和11日在这里..
not sure about 9th,10th and 11th on here..
1st 136.181.0.0/19
2nd 136.181.32.0/19
3rd 136.181.64.0/19
4th 136.181.96.0/19
5th 136.181.128.0/19
6th 136.181.160.0/19
7th 136.181.192.0/19
8th 136.181.224.0/19
9th 136.181.224.1/19
10th 136.181.224.33/19
11th 136.181.224.65/19
推荐答案
136.181.0.0/16 (255.255.0.0)
(N = Network, S = Subnet, H = Host)
10001000.10110101.00000000.00000000
NNNNNNNN.NNNNNNNN.HHHHHHHH.HHHHHHHH
NNNNNNNN.NNNNNNNN.SSSSHHHH.HHHHHHHH
01: 136.181.00000000.00000000/19 (136.181.0.0)
02: 136.181.00010000.00000000/19 (136.181.16.0)
03: 136.181.00100000.00000000/19 (136.181.32.0)
04: 136.181.00110000.00000000/19 (136.181.48.0)
05: 136.181.01000000.00000000/19 (136.181.64.0)
06: 136.181.01010000.00000000/19 (136.181.80.0)
07: 136.181.01100000.00000000/19 (136.181.96.0)
08: 136.181.01110000.00000000/19 (136.181.112.0)
09: 136.181.10000000.00000000/19 (136.181.128.0)
10: 136.181.10010000.00000000/19 (136.181.144.0)
11: 136.181.10100000.00000000/19 (136.181.160.0)
12: 136.181.10110000.00000000/19 (136.181.176.0)
13: 136.181.11000000.00000000/19 (136.181.192.0)
14: 136.181.11010000.00000000/19 (136.181.208.0)
15: 136.181.11100000.00000000/19 (136.181.224.0)
16: 136.181.11110000.00000000/19 (136.181.240.0)
你想要11个子网，所以你需要4个子网位来创建16（2 ^ 4）个子网，4094（2 ^ 12） -2）可用的主机地址。
You want 11 subnets, so you need 4 subnet bits creating 16 (2^4) subnets with 4094 (2^12-2) usable host addresses.
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