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
Explanation:
Router A receives 3 subnets: 172.16.64.0/18, 172.16.32.0/24 and 172.16.128.0/18.All these 3 subnets have the same form of 172.16.x.x so our summarized subnet must be also in
that form -> Only A, B or .
The smallest subnet mask of these 3 subnets is /18 so our summarized subnet must also have its
subnet mask equal or smaller than /18.
-> Only answer A has these 2 conditions -> .