多项选择题
A.IP protocol
B.IP time-to-live
C.source and destination IP address
D.source and destination MAC address
E.source and destination TCP/UDP port
多项选择题 WhichtwostatementsaboutJUNOSSoftwarepackethandlingarecorrect？（）
单项选择题 HostAopensaTelnetconnectiontoHostB.HostAthenopensanotherTelnetconnectiontoHostB.TheseconnectionsaretheonlycommunicationbetweenHostAandHostB.Thesecuritypolicyconfigurationpermitsbothconnections.HowmanyflowsexistbetweenHostAandHostB？（）
多项选择题 WhichtwofunctionsofJUNOSSoftwarearehandledbythedataplane？（）