单项选择题
In a frame ，the MPLS label is imposed（）.
A.After the Layer3 header and before Layer2 header
B.After the Layer2 header and before Layer3 header
C.Within the Layer 3 header
D.Before the layer 2 header
相关考题
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多项选择题
WhichIOSfeaturesareusedtoavoidRoutingloopswhendynamicRoutingprotocolsareusedbetweenPEandCEinMPLS-VPNnetworks？（）
A.Site Of Origin SOO.
B.SHAM links with OSPF
C.BGP cost community
D.BGP feature allow-as in
E.RPF Reverse Path forwarding.
F.Access-list Control in Distance Vector protocol like RIP and EIGRP. -
单项选择题
BCP（BestCommonPractices）38/RFC2827IngressandEgressPacketFilteringwouldhelpmitigatewhatclassificationofattack？（）
A.Sniffing attack
B.Denial of service attack
C.Port Scan attack
D.Reconnaisance attack
E.Spoofing attack -
单项选择题
BasedonthefollowingoutputinR1，whichstatementistrue？（）
A.If a labeled packet arrives with the top most label of 17， it will be replaced with label 19 and sent out on Ethernet 0/0 interface.
B.If a labeled packet arrives with the top most label of 19， it will be replaced with label 17 and sent out on Ethernet 0/0 interface.
C.If a labeled packet arrives with the top most label of 17， all the labels will be removed and a clear IP Packet is sent to Next Hop 192.168.0.14 on Ethernet 0/0.
D.None of the above.
