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Which WAN technology was designed to give homes and small business high speed digital dial-up service over already existing communication infrastructure?（）
- A、X25
- B、Frame Relay
- C、ATM
- D、ISDN
- E、ATX
- F、None of the above
参考答案
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下列 是继IP 技术之后的广域网传输技术，利用数据标签引导数据包在开放的通信网络上进行高速、高效传输，在一个无连接的网络中引入连接模式，减少了网络复杂性。
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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
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单选题Which WAN technology was designed to give homes and small business high speed digital dial-up service over already existing communication infrastructure?（）A
X25B
Frame RelayC
ATMD
ISDNE
ATXF
None of the above
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FHRP to remote branches.B
Layer 3 MPLS VPNs routing.C
Control protocols （for example Spanning Tree Protocol） for a Layer 3 MPLS service.D
Intrusion prevention， QoS， and stateful firewall support network wide.
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framerelayC
leaseDlineD
metroethernetE
widetransport
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