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

Refer to the exhibit.

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

Refer to the exhibit.

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

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



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iCalvyn.com

iCalvyn.com

Network 172.1.4.0/25 and network 172.1.4.128/25 can be grouped to a single network 172.1.4.0/24

Network 172.1.4.0/24 + Network 172.1.5.0/24 + Network 172.1.6.0/24 + Network 172.1.7.0/24 can be grouped to a single network 172.1.4.0/22 because we have all 4 subnetworks so we can move left 2 bits (2^2=4)