300-420 Question 283
Single answerAn organization is designing a multicast solution for a large financial trading application. The solution requires low latency and efficient use of network resources. The traffic flow is primarily from a few sources to many receivers, and some receivers are located across different autonomous systems. Which multicast design approach is most appropriate for this use case?
- A
Source-Specific Multicast (SSM)
- B
PIM Sparse Mode (PIM-SM)
- C
PIM Bidirectional (PIM-Bidir)
- D
Multicast Source Discovery Protocol (MSDP)
Show answer and explanation
Correct answer: D
Explanation
The financial trading application requires a solution that supports low latency and efficient one-to-many multicast communication across different autonomous systems. MSDP is specifically designed for inter-domain multicast scenarios, allowing multicast source discovery between autonomous systems while maintaining efficient resource usage. Other protocols like SSM, PIM-SM, and PIM-Bidir are either not optimized for inter-domain communication or not ideal for the described use case.
- A. Incorrect.
SSM is ideal for one-to-many multicast scenarios where the receivers know the source IP addresses. However, it does not support inter-domain multicast natively without additional configurations, making it less suitable for this use case.
- B. Incorrect.
PIM-SM is commonly used for multicast traffic with many-to-many communication patterns, but it is less efficient for low-latency, one-to-many traffic compared to other protocols.
- C. Incorrect.
PIM-Bidir is efficient for many-to-many communication within a single domain but is not suitable for inter-domain multicast traffic.
- D. Correct.
MSDP is specifically designed for inter-domain multicast, allowing multicast sources in one autonomous system to be discovered by receivers in another. It is the correct solution for this scenario as it supports low-latency, one-to-many communication across different domains.