Refer to the exhibit.
In this VLSM addressing scheme, what summary address would be sent from router A?
 

A. 172.16.0.0/16

B. 172.16.0.0/20

C. 172.16.0.0/24

D. 172.32.0.0/16

E. 172.32.0.0/17

F. 172.64.0.0/16




 

Suggested Answer: A

Two adjacent /18s would make a /17, but we also have the /24 to aggregate. The lowest IP address in all the 3 subnets is 172.16.32.0; the highest is
172.16.191.255. The smallest netmask to aggregate this whole range is a /16, and it would have to start at 172.16.0.0 to cover the three smaller subnets.

This question is in CCNA 200-125 exam 
For getting CCNA Certificate


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