A.FECmightcorrespondtoadestinationIPsubnet，butitmightalsocorrespondtoanytrafficclassthat theedgeLSRconsiderssignificant.
B.FECisagroupofIPpacketsthatisforwardedoveradifferentpath，butwiththesameforwarding treatment.
C.FECisagroupofIPpacketsthatisforwardedoverthesamepath，andwiththesameforwarding treatment.
D.FECisagroupofIPpacketsthatisforwardedoveradifferentpath，butwiththedifferentforwarding treatment.
E.FECisagroupofIPpacketsthatisforwardedoverthesamepath，butwithadifferentforwarding treatment
正确答案：参考A, C
