名词解释题link－state连接状态
名词解释题
link－state连接状态
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在系统总览包括三个层次。第一层显示();第二层显示();第三层显示()。 A.OCC硬件的状态/连接各车站ATS硬件的状态/连接联锁系统和ATP轨旁单元之间的状态/连接B.各车站ATS硬件的状态/连接OCC硬件的状态/连接联锁系统和ATP轨旁单元之间的状态/连C.OCC硬件的状态/连接联锁系统和ATP轨旁单元之间的状态/连接各车站ATS硬件的状态/连接D.各车站ATS硬件的状态/连接联锁系统和ATP轨旁单元之间的状态/连接OCC硬件的状态/连接
Which CLI command is used to see the current OSPF link－state database?() A. show ospf databaseB. show ospf neighborC. show protocols ospfD. show ospf link-state
What is the purpose of the OSPF link－state update packet?() A. describes a change to the OSPF hello timerB. carries one or more link-state advertisementsC. establishes and maintains neighbor relationshipsD. describes the contents of the entire link-state database
What information does a router running a link－state protocol use to build and maintain its topological database?() A. hello packetsB. SAP messages sent by other routersC. LSAs from other routersD. beacons received on point-to-point linksE. routing tables received from other link-state routersF. TTL packets from designated routers
Which two statements are correct regarding IS-IS?（）A、Routers maintain a single link-state database per area.B、Routers maintain a separate Level 1 link-state database.C、Routers maintain a separate Level 2 link-state database.D、Routers maintain a single Level 1 link-state database across multiple areas.
二次设备的退出状态是指（）A、二次设备的工作电源投入，出口连接片连接到指令回路的状态B、二次设备的工作电源投入，出口连接片断开时的状态C、二次设备的工作电源退出，出口连接片连接到指令回路的状态D、二次设备的工作电源退出，出口连接片断开时的状态
如果OSPF链路故障，哪个包广播网络的变化（）A、Link-state advertisementB、Database DescriptionC、Link-state requestD、Link-state update
What information does a router running a link-state protocol use to build and maintain its topological database？ （）A、 hello packetsB、 SAP messages sent by other routers C、 LSAs from other routersD、 beacons received on point-to-point linksE、 routing tables received from other link-state routersF、 TTL packets from designated routers
单选题What is the purpose of the OSPF link-state update packet?（）Adescribes a change to the OSPF hello timerBcarries one or more link-state advertisementsCestablishes and maintains neighbor relationshipsDdescribes the contents of the entire link-state database
单选题Which CLI command is used to see the current OSPF link-state database?（）Ashow ospf databaseBshow ospf neighborCshow protocols ospfDshow ospf link-state
多选题Which three fields are optional in an OSPFv3 external LSA？（）AForwarding AddressBExternal RouteCReference Link-State IDDOptionEPrefix Options
多选题Which two statements are correct regarding IS-IS？（）ARouters maintain a single link-state database per area.BRouters maintain a separate Level 1 link-state database.CRouters maintain a separate Level 2 link-state database.DRouters maintain a single Level 1 link-state database per area.
多选题What information does a router running a link-state protocol use to build and maintain its topological database?（）Ahello packetsBSAP messages sent by other routersCLSAs from other routersDbeacons received on point-to-point linksErouting tables received from other link-state routersFTTL packets from designated routers