Cisco Enhanced EtherSwitch Service Modules integrate Gigabit Ethernet and Fast Ethernet switch ports within Cisco 3900 and 2900 Series Integrated Services Routers. Which three features do these service modules include? (Choose three.)
A.
advanced wireless
B.
Auto Smartports
C.
Cisco EnergyWise
D.
Cisco StackWise
E.
enhanced PoE
F.
PSTN connectivity