what is the purpose of frame-relay LMI？

【参考答案】

Local Management Interface
The LMI ......

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Multi Protocol Label Switching （MPLS） is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label，if the stack bit is set to1，which option is true？（）

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C.The stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.
D.The stack bit is reserved for future use.

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The OSPF RFC 3623 Graceful Restart feature allows you to configure IETF NSF in ultivendor networks. When using OSPF Graceful Restart，which mechanism is used tocontinue forwarding packets during a switchover？（）

A.Reverse Path Forwarding
B.Hardware-based forwarding
C.UDP forwarding
D.Layer 2 Forwarding

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