Which security-enabled device is recommended to provide a site-to-site IPsec VPN solution， but not SSL？（）

A. Cisco IOS configuration
B. tri-band 11g single radios
C. rouge AP integration
D. single view to deploy and manage
E. secure guest access

A. 802.11 a
B. 802.11 a/b
C. 802.11 a/b/g/n
D. 802.11 b/g/n

A. a high-bandwidth environment with applications such as IP video
B. a predominantly telecommuter workforce
C. a robust LAN intrusion detection system
D. the intention to upgrade from Cisco Unified Communications Manager Express to Cisco Unified Communications Manager