Which two Cisco ISR series are needed to support a Cisco Services-Ready Engine to deploy
services on demand? (Choose two.)
A.
3900 Series
B.
2900 Series
C.
2800 Series
D.
800 Series
Explanation:
http://www.cisco.com/en/US/prod/collateral/modules/ps10598/data_sheet_c78-553913.html