How does Zscaler ensure high availability and redundancy?

Zscaler ensures high availability and redundancy primarily through its globally distributed cloud architecture. This architecture comprises multiple data centers located around the world, enabling seamless traffic routing and load balancing across different points of presence (PoPs). By having a decentralized network structure, Zscaler can maintain continuous service availability even if one location experiences issues or goes offline. This design allows for automatic failover and redundancy, meaning that if a server or data center goes down, traffic can be rerouted to the nearest available resource without impacting user experience.

The choice of routing traffic through a single data center would inherently create single points of failure, resulting in potential downtime and instability. Using local servers for all traffic management could lead to performance bottlenecks and limited capacity, and a centralized network system would not support the flexibility and resilience that a distributed approach offers. In contrast, the global distribution of Zscaler's architecture is key to its ability to provide rapid, reliable, and secure access to applications and data for users regardless of their location.