Enterprises often begin cloud security migrations at branch locations, where firewalls mainly protect internet access and are easier for most SSE solutions to replace. However, replacing datacenter firewalls is far more complex because they handle WAN traffic management, enforce strict LAN segmentation, and ensure reliability and high availability. These broader functions make datacenter firewall migration challenging. An effective SSE must therefore deliver advanced traffic control, segmentation, and resilience to fully replace physical datacenter firewalls while maintaining strong security and performance.

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