What is the most efficient summarization that R1 can use to advertise its networks to R2?

seenagapeDecember 19, 2015

Refer to the exhibit.

A.
172.1.0.0/22

B.
172.1.0.0/21

C.
172.1.4.0/22

D.
172.1.4.0/24
172.1.5.0/24
172.1.6.0/24
172.1.7.0/24

E.
172.1.4.0/25
172.1.4.128/25
172.1.5.0/24
172.1.6.0/24
172.1.7.0/24

Explanation:
The 172.1.4.0/22 subnet encompasses all routes from the IP range 172.1.4.0 – 172.1.7.255.

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