单项选择题
A.75 percent
B.60 percent
C.56 percent
D.50 percent
E.25 percent
问答题 网络安全涉及到OSI哪几层？
单项选择题 YouareresponsiblefornetworkmonitoringandneedtomonitortrafficoveraroutednetworkfromaremotesourcetoanIDSorIPSlocatedintheheadquarterssite.Whatwouldyouuseinordertoaccomplishthis？（）
单项选择题 WhichofthefollowingdescribestheappropriateportassignmentandmessageexchangeinastandardTFTPtransaction？（）