多项选择题
Which three protocols should be explicitly managed by using Control Plane Policing on an Internet border router？（）
A.LDAP B.ICMP C.RTP D.BGP E.SSH F.RDP
单项选择题 WhichQoSmechanismcanhelpclassifydifferentkindsofCitrixtraffic（printjobversusreal-timeterminalcontrol）？（）
单项选择题 WhichstatementiscorrectaboutanOSPFsham-link？（）
单项选择题 WhichrouterisdoingLSAtype7totype5translation，andwhy？（）
