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Which command do you use to connect a dense-mode domain to a sparse-mode multicast domain?
Correct Answer: D
Explanation/Reference: Explanation: For IP PIM multicast, Cisco recommends Sparse-Mode over Dense-Mode. In the midst of our network migration, we have a new network operating in Sparse-Mode with Anycast rendezvous point (RP) but our existing network is still operating in Dense-Mode. To bridge two different modes across both PIM domains, we should use the ip pim dense-mode proxy-register command on the interface leading toward the bordering dense mode region. This configuration will enable the border router to register traffic from the dense mode region (which has no concept of registration) with the RP in the sparse mode domain. Reference: http://networkerslog.blogspot.com/2010/12/bridging-dense-mode-pim-to-sparse- mode.html