Learn about PIM-SSM, the ideal choice for a multidomain, multicast-based network that forwards traffic using SPT. Explore the differences between PIM flavors in this CCDE v3.0 exam question.
Table of Contents
Question
Company XYZ network runs IPv4 and IPv6 and they want to introduce a multidomain, multicast-based network. The new design should use a flavor of PIM that forwards traffic using SPT. Which technology meets this requirement?
A. PIM-SSM
B. PIM-SM
C. BIDIR-PIM
D. PIM-DM
Answer
A. PIM-SSM
Explanation
A. PIM-SSM (Protocol Independent Multicast – Source-Specific Multicast) is the correct choice for a multidomain, multicast-based network that forwards traffic using the Shortest Path Tree (SPT). PIM-SSM builds the SPT from the source directly to the receivers, eliminating the need for a Rendezvous Point (RP) and the shared tree. This results in a more efficient and scalable multicast forwarding mechanism, making it suitable for multidomain environments.
B. PIM-SM (Protocol Independent Multicast – Sparse Mode) initially uses a shared tree rooted at the RP and then switches to the SPT. While it can work in a multidomain environment, it is not as efficient as PIM-SSM due to the initial use of the shared tree.
C. BIDIR-PIM (Bidirectional PIM) uses a shared bidirectional tree rooted at the RP and does not switch to the SPT. This makes it unsuitable for the given requirement of forwarding traffic using the SPT.
D. PIM-DM (Protocol Independent Multicast – Dense Mode) assumes that all hosts want to receive multicast traffic and floods the network initially. It is not suitable for large-scale, multidomain networks and does not use the SPT by default.
In summary, PIM-SSM is the most appropriate choice for a multidomain, multicast-based network that requires forwarding traffic using the SPT, as it provides a scalable and efficient solution without the need for an RP or a shared tree.
Cisco Certified Design Expert CCDE v3.0 400-007 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Cisco Certified Design Expert CCDE v3.0 400-007 exam and earn Cisco Certified Design Expert CCDE v3.0 400-007 certification.