All-in-one UTM security gateways are starting to displace routers in many small business networks. What does UTM stand for？（）

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

A. device-level warranty
B. Cisco Small Business Pro products only
C. speed of hardware replacement
D. access to Cisco Small Business Support Community