多项选择题
A.Designated Root Cost
B.bridge ID priority
C.max age
D.bridge ID MAC address
E.Designated Root Priority
F.forward delay
单项选择题 SpanningTreeProtocolIEEE802.1sdefinestheabilitytodeploywhichofthese？（）
单项选择题 TworoutersconfiguredtorunBGPhavebeenconnectedtoafirewall，oneontheinsideinterfaceandone ontheoutsideinterface.BGPhasbeenconfiguredsothetworoutersshouldpeer，includingthecorrectBGPsessionendpointaddressesandthecorrectBGPsessionhop-countlimitEBGPmultihop.WhatisagoodfirsttesttoseeifBGPwillworkacrossthefirewall？（）
多项选择题 Choosetwocommandsthatarerequiredtoenablemulticastonarouter，whenitisknownthatthereceiversuseaspecificfunctionalityofIGMPv3.（）