Which NetScaler mode uses the client IP address as the resource IP for connections from the NetScaler to servers?

• A. USIP
• B. Layer 3
• C. USNIP
• D. Layer 2

Answer: (A)

The important idea here is how NetScaler decides what IP appears as the source when it talks to the backend servers. In Use Source IP mode, the NetScaler uses the original client’s IP address as the source IP for connections to the real servers. This means the backend sees the client IP, which is essential for accurate logging, IP-based policies, and correct server-side decisions that depend on the client’s address.

The other options don’t guarantee that behavior. Using the NetScaler’s SNIP as the source IP (Use SNIP as source IP) makes the servers see the NetScaler’s address instead of the client’s. Layer 2 and Layer 3 describe broader deployment/topology modes (bridging vs routing) and don’t define this specific source IP behavior for server connections.

So, the mode that preserves the client IP as the source when the NetScaler connects to servers is Use Source IP.