单选题An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?（）AEXP bitsBVPI / VCICshim headerDSNAP header
单选题
An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?（）
A
EXP bits
B
VPI / VCI
C
shim header
D
SNAP header
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