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