You are the Cisco Network Designer in Cisco.com. Which signal and noise values will result in the best phone communication with an access point?（）

A. transparent
B. proxy
C. reverse proxy
D. direct

A. Flex Links
B. loop-free U
C. looped square
D. looped triangle
E. loop-free inverted U

A. scale to a large size
B. increase router peering
C. provide a flexible topology with no spanning tree loops
D. control broadcasts in the backbone