单项选择题
Which of the following is true about the MPLS header and its EXP field size？（）
A.The MPLS header is 2 bytes，and the EXP field is 3 bits long.
B.The MPLS header is 1 byte，and the EXP field is 3 bits long.
C.The MPLS header is 4 bytes，and the EXP field is 3 bits long.
D.The MPLS header is 3 bytes，and the EXP field is 3 bits long.
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多项选择题
WhichtwostatementsaretrueaboutRED？（）
A.RED randomly drops packets before the queue becomes full.
B.RED is always useful，without dependency on flow.
C.RED increases the drop rate as the average queue size increases.
D.RED has a per-flow intelligence. -
单项选择题
WhatisthecommandtoconfigureRSVPtoreserveuptoone-tenthofaGigabitlink，butonlyalloweachindividualflowtouse1MB/s？（）
A.ip rsvp bandwidth 100000 1000
B.ip rsvp bandwidth 100000 1
C.ip rsvp bandwidth 10 1
D.ip rsvp bandwidth 1000000 1000 -
多项选择题
WhichthreeprotocolsorapplicationsshouldbeplacedinaclassthatisconfiguredwithWRED？（）
A.HTTP
B.RTP
C.streaming video
D.BitTorrent
E.POP3
