A、 In a single device，ISRs provide threat defense against attacks from hackers and viruses thatcan occur in the network.

B、 In a single device，ISRs provide the framework to integrate and extend wired and wirelessnetworks.

C、 In a single device ISRs provide concurrent security， voice， data， wireless and applicationoptimization services.

D、 In a single device，ISRs provide the common fabric，functionality，and CLI across the network.