Based on the assessment of the current company infrastructure, which design option is best for remote access?

Deploying six NetScaler appliances (two in each datacenter) is often excessive for the initial design of basic remote access distribution, leading to increased costs and management complexity without a proportional benefit over a single appliance per site for distributed access.

Deploying one NetScaler appliance in each of the three datacenters-New York, Hong Kong, and London-is an effective strategy for global remote access. This design ensures that users connect to an appliance geographically closer to them, reducing latency and providing efficient local access to corporate resources.

Deploying only two NetScaler appliances, one in London and one in New York, would neglect the Hong Kong region, forcing users there to traverse long distances for remote access, which significantly increases latency and degrades user experience.

Deploying a single pair of NetScaler appliances exclusively in the London failover datacenter would centralize all remote access, causing high latency and poor performance for users in other global regions, thereby failing to provide an optimal distributed remote access solution.