多项选择题
A.ping
B.Telnet
C.FTP
D.TCP
E.IP
单项选择题 WhichtypeofattackischaracterizedbyafloodofpacketsthatarerequestingaTCPconnectiontoaserver？（）
单项选择题 Thecommandframe-relaymapip10.121.16.8102broadcastwasenteredontherouter.Whichofthefollowingstatementsistrueconcerningthiscommand？（）
多项选择题 Asingle802.11gaccesspointhasbeenconfiguredandinstalledinthecenterofasquareoffice.Afewwirelessusersareexperiencingslowperformanceanddropswhilemostusersareoperatingatpeakefficiency.Whatarethreelikelycausesofthisproblem?(Choosethree.)（）