what valid summary address (below) contains the longest prefix?

networkmanagers

13 years ago

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Given the four networks listed, what valid summary address (below) contains the longest prefix?

A.
10.1.0.0/20

B.
10.1.0.0/16

C.
10.1.1.0/23

D.
10.1.16.0/19

E.
These networks cannot be summarized.