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 recomme
题目
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
MPLS
B
framerelay
C
leaseDline
D
metroethernet
E
widetransport