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GATE CSE 2022
MCQ (More than One Correct Answer)
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Consider routing table of an organization's router shown below :

Subnet number Subnet mask Next hop
12.20.164.0 255.255.252.0 R1
12.20.170.0 255.255.254.0 R2
12.20.168.0 255.255.254.0 Interface 0
12.20.166.0 255.255.254.0 Interface 1
default R3

Which of the following prefixes in CIDR notation can be collectively used to correctly aggregate all of the subnets in the routing table?

A
12.20.164.0/20
B
12.20.164.0/22
C
12.20.164.0/21
D
12.20.168.0/22
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