多项选择题
What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)（）
A.VLAN support B.compression C.authentication D.sliding windows E.multilink support F.quality of service
多项选择题 WhichtwostatementsbestdescribethewirelesssecuritystandardthatisdefinedbyWPA？（Choosetwo.）（）
单项选择题 HowshouldarouterthatisbeingusedinaFrameRelaynetworkbeconfiguredtoavoidsplithorizonissuesfrompreventingroutingupdates?（）
单项选择题 Whatshouldbepartofacomprehensivenetworksecurityplan?（）
