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In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient
In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient
admin
2019-04-08
19
问题
In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links?
选项
A、255.255.255.0
B、255.255.255.240
C、255.255.255.248
D、255.255.255.252
E、255.255.255.254
答案
D
解析
在点到点的链路上因为只需要分配两个地址给两端就可以了,所以加上网络地址和广播地址,这个网段也就只需要有4个地址了,所以网络位需要匹配30位,掩码就为255.255.255.252.
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