Which of the following is not a characteristic of Cisco Express Forwarding？（）

• A、The adjacency table is populated from a router’s ARP cache
• B、CEF does not require the first packet of a data flow to be process switched
• C、CEF maintains the Forward Information Base and the adjacency table
• D、CEF can be enabled with the interface command ip cef
• E、The FIB is populated from a router’s IP routing table
• F、On most router platforms CEF is enabled by default