单项选择题
A.MPLS
B.Load Balancing
C.Class Based Forwarding
D.Filter Based Forwarding
单项选择题 WhichextensiontotheOSPFv2protocolsupportstrafficengineering？（）
单项选择题 WhenusingOSPFasyourIGP，whichoperationalcommandmustbeenabledtopopulatetheTEDforCSPFcalculations？（）
多项选择题 Given the community： communitymy-company members "^[1-3]*7：666$"； Which four communities does this expression match？（）