单项选择题
A.Reverse Path Forwarding
B.Hardware-based forwarding
C.UDP forwarding
D.Layer 2 Forwarding
单项选择题 Youareconfiguringan802.1QtrunkbetweenaLayer2switchandafirewall.Youreadinthedocumentationthatthebestwaytosetupatrunkistosettheportasdynamicdesirable.Thetrunkisnotcomingup.Whichoneoftheseoptionswouldbeavalidexplanation？（）
多项选择题 WhichtwoofthefollowingareconsideredvalidrouterIDsforEIGRPv6？（）
多项选择题 Whentroubleshootingduplexmismatches，whichtwoareerrorsthataretypicallyseenonthehalfduplexend？（）