问答题
A PHB is a description of̳......
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Whatarethemandatory，well-knownBGPattributes？（）A.origin,...
单项选择题What are the mandatory， well-known BGP attributes？（）
A.origin,AS-path,next-hop B.AS-path,origin,MED C.AS-path,origin,weight D.AS-path,weight,MED
R1收到组播信息而R2收不到，why？
YouuseOSPFasyournetworkroutingprotocol.Youusethecommand...
单项选择题You use OSPF as your network routing protocol. You use the command show ip route and you see several routes described as O， O IA， O E1， and O E2. What routes are in your area？（）
A.O IA B.O E1 C.O E2 D.O
