多項選擇題

Pick the 4 valid ATM Cell Header fields：（）

A.GFC-4 bits of generic flow control
B.Forward-explicit congestion notification（FECN）
C.VCI-16 bits of virtual channel identifier
D.CLP-1 bit of congestion loss
E.HEC-8 bit of header error control
F.ATM Discard Eligibility（DE）bit

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單項選擇題

BGP best route selection process is based on what ？（）

A.lowest cost
B.highest bandwidth
C.lowest hop-count
D.path attributes
E.lowest delay

多項選擇題

Which two statements are true about RPF checks in MSDP（Multicast Source Discovery Protocol）？（）

A.It prevents message looping，Session Advertisement（SA）messages must be RPF checked
B.RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SA
C.RPF checking Session Advertisement（SA）messages will cause message looping
D.RPF check should be done against the route to the source S of the corresponding PIM-SM domain

Pick the 4 valid ATM Cell Header fields：（）

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BGP best route selection process is based on what ？（）

Which two statements are true about RPF checks in MSDP（Multicast Source Discovery Protocol）？（）

BGP best route selection process is based on what ？（）