Click the exhibit button. Router 2 advertises the network 192.168.3.0/24 to router R1 via IS-IS. How can router R1 ensu

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Click the exhibit button.

Router 2 advertises the network 192.168.3.0/24 to router R1 via IS-IS.
How can router R1 ensure that it discards the route?

Click The Exhib 1 (48.8 KiB) Viewed 51 times

A. Use a prefix list on router R1 to discard all ingress IS-IS routes.
B. Use an export policy and prefix list on router R1.
C. Use an import policy and a prefix list on router R1.
D. This is not possible because IS-IS cannot use import policies.