多项选择题
A. improving business processes
B. making existing resources more productive
C. offering enhanced customer service
D. providing flexible channel and delivery options
单项选择题 Identity authentication, protocol encryption, secure guest access, voice over WLAN features, and a small device footprint are all highlights of what product in the wireless technology market?（）
单项选择题 Increased productivity, minimized legal risks, and improvements in "green" operation can be easily linked to Cisco solutions in which technology area?（）
多项选择题 Select the three foundational hardware components that comprise the Smart Business Communication System.（）