单选题If voice and data traffic will be sent and received via a WAN links， what must be configured to provide a certain amount of dedicated bandwidth and to prioritize the voice traffic over other types of network traffic？（）AIPSec VPNBQoS mechanismCFirewallDNATEEIGRP routing protocolFStatic routing
单选题
If voice and data traffic will be sent and received via a WAN links， what must be configured to provide a certain amount of dedicated bandwidth and to prioritize the voice traffic over other types of network traffic？（）
A
IPSec VPN
B
QoS mechanism
C
Firewall
D
NAT
E
EIGRP routing protocol
F
Static routing
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