There is MPLS VPN traffic traversing through a TE intermediate router. What is the MPLS packet labelstack sequence （from outer to inner） for the VPN traffic on this router？（）

多项选择题UnicastReversePathForwarding（Urpf）canworkinthefollowingmodes：（）

A.Express mode
B.Strict mode
C.Loose mode
D.Tunnel mode
E.Safe mode

多项选择题SelectthethreevalidLMIextension.（）

A.Multicasting
B.Global addressing
C.Forward-explicit congestion notification （FECN）
D.Virtual circuit status messages.
E.Backward-explicit congestion notification （BECN）

多项选择题WhenprovisioningforInteractive-Video（e，g，videoconferencingtraffic）whichthreestatementsdepictsthecorrectrequirements？（）

A.Loss should be no more than 1 percent.
B.One-way latency should be no more than 150 ms
C.Jitter should be no more than 30 ms
D.Loss should be no more than 3 percent
E.One-way latency should be no more than 150/2=75 ms
F.Jitter should be no more than 300 ms

单项选择题WhatisthetypicalmarkedDSCPvalueforavoicemediapacketinVoiceoverIPtechnology？（）

A.AF41
B.AF31
C.AF21
D.BE
E.EF

单项选择题WhichstatementabouttheLinkControlProtocol（LCP）istrue？（）

A.LCP is used for basic PPP link setup and operation.
B.LCP is used for PPP CHAP authentication.
C.LCP is used for PPP over ATM （PPPoA） setup.
D.LCP is used for PPP over Ethernet （PPPoE） setup.
E.LCP is used for PPP over Frame Relay （PPPoFR） setup