QUESTIONS FOR READERS Figure 16.10 shows some of the concepts discussed in this chapter and can be used to help you answer the following questions. 1. Generally, it is a good idea for RPs to be centrally located on the router network. Why does this make sense? 2. In Figure 16.10, does the rightmost host, which is interested in Group B content, have to get it initially from the RP when the source is closer? 3. Would the RP be required if the routers were running PIM dense mode? 4. Will the leftmost router with the uninterested host constantly stream multicast traffi c onto the LAN anyway? 5. Is the uninterested host on the LAN in the middle able to listen in on Group A and Group B traffi c without using IGMP to join the groups? Multicast Source (Group A) Multicast Host Multicast Routers Multicast Host Uninterested Host Uninterested Host Interested Host (Group A) Interested Host (Group B) Interested Host (Group B) Interested Host (Group B) Routers Running PIM Sparse Mode Multicast Host Multicast Source (Group B) RP Multicast Host Multicast Host Multicast Host Multicast Host Multicast Host FIGURE 16.10 A group of routers running PIM sparse mode with sources and receivers. 429 . PIM dense mode? 4. Will the leftmost router with the uninterested host constantly stream multicast traffi c onto the LAN anyway? 5. Is the uninterested host on the LAN in the middle able to listen. of their journey over the Internet, and this percentage will only go higher in the future. Why not watch an entire movie or TV show over the Internet? Many now watch episodes they missed on the. carry voice, video, and data on the same links. Let’s see if we can “converge” these different applications onto the Illustrated Network. This chapter will use the Illustrated Network routers exclusively.