单项选择题
With the DSCP value fo "101110"， what does the "11" in bits 1 and 2 indicate ？（）
A.AF Class
B.Drop Probability
C.CS（Class Selector Value ）
D.PHB （Per-Hop Behavior ）
E.IP Precedence
F.Queue Depth
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多项选择题
SONET’sthreelayersare（）.
A.Section
B.Line
C.Frame
D.Path
E.DS1 -
单项选择题
WhichofthefollowingdescriptionsaboutIPspoofingiscorrect？（）
A.IP source address is forged
B.IP destination address is forged
C.IP TCP source port is forged
D.IP TCP destination port is forged
E.None of above -
多项选择题
WhichmethodswouldenabletraffictobeforwardedalonganMPLSTEtunnel？（）
A.MP-BGP routing
B.Static routing
C.Policy routing
D.Autoroute
E.Forwarding adjacency
