A Citrix Administrator needs to use a client's IP address as the source IP address for Citrix ADC-to-server connections. Which ADC mode supports this?

A Citrix Administrator needs to use a client's IP address as the source IP address for Citrix ADC-to-server connections. Which ADC mode supports this?

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

Answer: (C)

Preserving the client’s address as the source for connections from the Citrix ADC to backend servers is achieved with Use Source IP (USIP). When USIP is enabled, the ADC uses the original client IP as the source address on connections to the servers, so those servers see the real client IP in logs and can apply IP-based policies or auditing accordingly. This is essential when server-side applications rely on the client’s true address for security, tracking, or behavior. Layer 2 mode operates at the data link layer and doesn’t guarantee use of the client IP for backend connections. Layer 3 mode routes traffic and, by default, would present the ADC’s own source IP unless USIP is explicitly enabled. USNIP is another mode that uses a NAT approach, not preserving the original client IP for backend connections.

Preserving the client’s address as the source for connections from the Citrix ADC to backend servers is achieved with Use Source IP (USIP). When USIP is enabled, the ADC uses the original client IP as the source address on connections to the servers, so those servers see the real client IP in logs and can apply IP-based policies or auditing accordingly. This is essential when server-side applications rely on the client’s true address for security, tracking, or behavior.

Layer 2 mode operates at the data link layer and doesn’t guarantee use of the client IP for backend connections. Layer 3 mode routes traffic and, by default, would present the ADC’s own source IP unless USIP is explicitly enabled. USNIP is another mode that uses a NAT approach, not preserving the original client IP for backend connections.