Which mode must be configured to allow an ADC to control packet forwarding based on route table lookups?

Which mode must be configured to allow an ADC to control packet forwarding based on route table lookups?

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

Answer: (B)

To forward packets based on route table lookups, the device must perform IP routing. That capability comes only when Citrix ADC is in Layer 3 mode. In Layer 3, the appliance has IP addresses on its interfaces, maintains a routing table (static and dynamic), and makes forwarding decisions by checking the destination IP against that table to choose the next hop or exit interface. Layer 2 mode, on the other hand, forwards frames purely by MAC addresses within a local broadcast domain, with no route-table lookups. MBF and USIP are related features, not the fundamental mode that enables route-based forwarding. So Layer 3 mode is the correct configuration for route-table-based packet forwarding.

To forward packets based on route table lookups, the device must perform IP routing. That capability comes only when Citrix ADC is in Layer 3 mode. In Layer 3, the appliance has IP addresses on its interfaces, maintains a routing table (static and dynamic), and makes forwarding decisions by checking the destination IP against that table to choose the next hop or exit interface. Layer 2 mode, on the other hand, forwards frames purely by MAC addresses within a local broadcast domain, with no route-table lookups. MBF and USIP are related features, not the fundamental mode that enables route-based forwarding. So Layer 3 mode is the correct configuration for route-table-based packet forwarding.