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Consider the network diagram below. Each router (a square in the figure) is labeled with the names of its interfaces (e.g., eth0) and the IP addresses assigned to each. Each network (a circle) is labeled with its network name and prefix length.What is the most concise CIDR block in the routing table of R2 that can be used to describe the networks reachable through R1?192.168.128/17192.168.16/21192.168.128.1 192.168.16.1 eth0 eth0 10.0.1.2 10.0.2.2 192.168.8.1 th3R1 eth1 th3 R2 eth1 10.0.2.1 8th

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