51. A network architect of a stock exchange broker is implementing a DR, high-availability plan. Which of the following approaches would be the best fit?
Answer: B
Active-active is the best approach for a DR, high-availability plan.
Implementing an active-active approach ensures that all systems are operational at all times, providing continuous availability and load balancing. This is particularly crucial for a stock exchange broker where downtime could lead to significant financial losses.
A) Warm site
A warm site is a backup site with hardware and software ready to be configured, but it typically requires time to become fully operational in the event of a disaster. While it provides a level of redundancy, it does not offer the immediate failover capabilities needed for critical applications like those used in stock trading.
B) Active-active
The active-active configuration allows multiple systems to run simultaneously, sharing the load and providing instantaneous failover capabilities. This is essential for maintaining high availability, especially in environments like stock exchanges where every second counts and any downtime could result in financial repercussions.
C) Full mesh
A full mesh network topology connects all nodes to each other, which may enhance communication and redundancy. However, it does not specifically address the high-availability and disaster recovery requirements needed for a stock exchange broker, making it less suitable compared to the active-active approach.
D) In-band
In-band management involves using the same network as the primary data traffic for management tasks. While this can be efficient, it does not directly relate to disaster recovery or high-availability strategies. In-band management could potentially introduce vulnerabilities during a failure, making it a less viable option for critical services.
Conclusion
The active-active approach is the most effective for ensuring continuous availability and immediate failover capabilities in a high-stakes environment like a stock exchange. Other options, such as warm sites, full mesh, and in-band, do not provide the same level of responsiveness and reliability, ultimately making them less suitable for the critical needs of a stock broker's disaster recovery and high-availability plan.