Which feature allows client requests to pass through the NetScaler while responses from back-end resources are sent directly to the client, bypassing the NetScaler?

Which feature allows client requests to pass through the NetScaler while responses from back-end resources are sent directly to the client, bypassing the NetScaler?

• A. Policy-based Routing
• B. Use Source IP (USIP) address
• C. Direct Server Return (DSR)
• D. Smart Access

Answer: (B)

This is about letting the request go through the NetScaler but having the backend’s response go straight back to the client. Use Source IP (USIP) is the feature that makes this possible by using the client’s IP as the source address when the NetScaler forwards the request to the back‑end resource. Because the backend sees the client IP as the source, its reply is addressed to the client directly, so the NetScaler isn’t involved in returning traffic. This preserves the original client IP and can reduce load and latency on the NetScaler, while still enabling the device to steer and load‑balance the initial request. For USIP to work, the network must allow direct return traffic to the client and the back-end servers must be able to respond to the client IP (no conflicting NAT). Other options aren’t about enabling this direct return path: policy‑based routing is about how traffic is routed, not the return path; direct server return is the general idea of bypassing the appliance on the return, whereas USIP specifically uses the client IP for the back-end path; and Smart Access addresses access control, not the bypass of NetScaler for responses.

This is about letting the request go through the NetScaler but having the backend’s response go straight back to the client. Use Source IP (USIP) is the feature that makes this possible by using the client’s IP as the source address when the NetScaler forwards the request to the back‑end resource. Because the backend sees the client IP as the source, its reply is addressed to the client directly, so the NetScaler isn’t involved in returning traffic. This preserves the original client IP and can reduce load and latency on the NetScaler, while still enabling the device to steer and load‑balance the initial request. For USIP to work, the network must allow direct return traffic to the client and the back-end servers must be able to respond to the client IP (no conflicting NAT). Other options aren’t about enabling this direct return path: policy‑based routing is about how traffic is routed, not the return path; direct server return is the general idea of bypassing the appliance on the return, whereas USIP specifically uses the client IP for the back-end path; and Smart Access addresses access control, not the bypass of NetScaler for responses.