单选题A customer asks for help choosing their WAN technology, the customer is looking for A solution that can be used across very long distances, provides QoS and VPN support, and is sensitive to their budgeting needs ,which WAN technology would you recommend?（）Awide transportBmetroethernetCframe relayDleaseD lineEMPLS
单选题
A customer asks for help choosing their WAN technology, the customer is looking for A solution that can be used across very long distances, provides QoS and VPN support, and is sensitive to their budgeting needs ,which WAN technology would you recommend?（）
A
wide transport
B
metroethernet
C
frame relay
D
leaseD line
E
MPLS
参考解析
解析：
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