CCNA 求解

mengwuhencheng

QUESTION 22
You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are
asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts
each.Which IP address range meets these requirements?
A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25
Answer: B

请问这题A 为啥不行，谢谢。

saoty

选B是因为考虑在数据中心环境，网关也占用了一个IP

yishuizhao

回复 saoty 的帖子

有道理  领教了