Which Citrix ADC feature can be used to reuse existing TCP connections?

• A. content switching
• B. TCP buffering
• C. ICA keep alive
• D. connection multiplexing

Answer: (D)

Reusing existing TCP connections is achieved through connection multiplexing. This feature lets the Citrix ADC keep a pool of persistent TCP connections to each backend service and handle multiple client requests over those same connections. Instead of opening a new TCP handshake for every new client request, the ADC assigns the request to an available pooled connection and uses it to carry the traffic. This reduces connection setup overhead, lowers CPU and memory use on both the ADC and the backend servers, and improves throughput and latency in environments with high connection churn or bursty traffic. It’s a practical way to scale TCP-based workloads without sacrificing responsiveness.

Content switching routes requests based on content, not on reusing connections. TCP buffering is about delaying or smoothing data in transit. ICA keep alive deals with keeping Citrix ICA sessions active.