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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 for point-to-point serial links()。

题目

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

参考答案
参考答案:D