Huawei
H12-821_V1.0 · Question #699
H12-821_V1.0 Question #699: Real Exam Question with Answer & Explanation
The correct answer is B. You can use the grafting mechanism to proactively establish a multicast distribution path in reverse direction to help new users receive multicast information. C. The multicast network needs to update the multicast distribution tree before it can send multicast data to group members.. See the full explanation below for the reasoning.
Question
A new member joins a multicast group in PIM-DM, which of the following descriptions are correct? (Multiple choice)
Options
- AIn PIM-DM mode, after using the "diffusion-pruning" method to establish a multicast distribution tree, the status refresh mechanism prevents the downlink interface from entering the pruned state due to periodic reports.
- BYou can use the grafting mechanism to proactively establish a multicast distribution path in reverse direction to help new users receive multicast information.
- CThe multicast network needs to update the multicast distribution tree before it can send multicast data to group members.
- DAfter a member joins the multicast group, the multicast routing table no longer needs to be updated.
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