A.May have Ethernet as well as non-Ethernet interfaces
B.Traditionally used as a standalone device for inter-VLAN communication
C.Makes use of TCAMs
D.Uses subinterfaces to define trunks
E.Can use both Layer 2 and Layer 3 to make forwarding decisions
F.Allows the definition of Switched Virtual Interfaces（SVI）

A.Use the ip nbar pdlm command to allow NBAR to reference a new PDLM in flash memory
B.If NBAR doesn’t recognize certain applications you must contact Cisco and ask them to emailyou a new PDLM for that application
C.Use the ip nbar port-map command to allow NBAR to recognize certain applications with anev/port number
D.The applications not being recognized can be rerouted to an NBAR collector， which has a morecomplete list of applications
E.Use the copy nbar flash： command to download a new PDLM file to flash
F.Use the ip nbar pdlm command to download a new NBAR reference file from the Cisco website