Which two of these are features of the Cisco 2851 Integrated Services Router, but not features of Cisco 1800 Series Integrated Services Routers? (Choose two.)
A. 32-Gbps switching bus
B. built-in wireless module
C. Cisco SDM for simplified management
D. two integrated 10/100/1000 Ethernet ports
E. Power over Ethernet support for 10/100 Ethernet ports
F. slots dedicated to Cisco High-Density Analog and Digital Extension Module for Voice and Fax
