子网划分问题

Question

可能重复：
子网划分如何工作？

子网 192.168.176.200/30 上的最后一个有效主机是什么？你是如何得到答案的

Answer 1

子网划分如何工作看看提到的帖子。它应该能回答你的问题。

但供参考：

192.168.176.200/30 - Mask of 252 (Block size of 4 (256-252)) In the four Octet. 
A /30 means 30 network bits are "on" (1's) so:

1111 1111.1111 1111.1111 1111.1111 1100 = /30

Looking at the forth octet: 1111 1100 = 252 in Decimal

Your valid subnets increment by the block size... In this case 4

So your valid subnets would then be 192.168.176.0, 192.168.176.4,...192.168.176.252

192.168.176.200 -> 192.168.176.200 to 192.168.176.203 (.204 is the next subnet)
192.168.176.201 -> first valid host
192.168.176.202 -> last valid host
192.168.176.203 -> Broadcast Address

然而，我强烈建议阅读“子网划分如何工作”这篇文章。