Refer to the exhibit. Which statement is true？（）

A. Voice traffic is affected more by link speed than FTP traffic is.
B. Voice traffic is affected more by packet delays than FTP traffic is.
C. Voice streams involve larger packet sizes than most TCP network traffic involves.
D. Voice traffic is more sensitive to packet loss than TCP network traffic is.
E. Voice traffic requires QOS mechanisms only in heavily loaded network segments.

A. The processing of 802.11 data and management protocols and access point capabilities is distributed  between a lightweight access point and a centralized WLAN controller.
B. LWAPP aggregates radio management forward information and sends it to a wireless LAN solution  engine.
C. LWAPP authenticates all access points in the subnet and establishes a secure communication channel  with each of them.
D. LWAPP advertises its WDS capability and participates in electing the best WDS device for the wireless  LAN

A. access point certification and software control
B. compression and Layer 3 address mapping
C. Layer 3 addressing and distribution
D. packet encapsulation， fragmentation， and formatting
E. SNMP monitoring services