Why is deploying four NetScaler appliances - two in the primary and two in the secondary datacenter with a NetScaler virtual server for each appliance binded to a session policy, the best remote acces

While security and reliability are general benefits, 'cost-effective' is not guaranteed with four appliances, and the specific mention of session policies points to advanced remote access features, not just general connectivity.

Redundancy is addressed by the four-appliance, two-datacenter setup, but the explicit mention of 'session policy' highlights advanced remote access control rather than general WAN optimization.

This configuration focuses on scaling remote access and applying granular policies for SSL VPN, not on segmenting Gateway and load-balancing features.

Deploying four NetScaler appliances provides significant capacity for expected expansion of remote access usage across two data centers. Binding a virtual server to a session policy is crucial for granular control over SSL VPN connections, enabling detailed authentication, authorization, and network resource access based on user groups or device posture for scaling remote access.