Which Cisco Small Business wireless product can be used to connect the network of a sales office to a warehouse in the building across the parking lot？（） 

A. United Threat Monitor
B. Universal Threat Manager
C. Unified Threat Management
D. Ultimate Threat Monitoring

A. NBD callback from specialized engineers during regular business hours
B. support for every Cisco product
C. support for low-end products only
D. cases opened via e-mail or telephone at any time
E. advanced replacement on the next business day
F. immediate support from the Cisco TAC engineers