Which two statements are correct about Nonstop Forwarding？（） ["It allows the standby RP to take control of the device after a hardware or software fault on the active RP.","It is a Layer 3 function that works with SSO to minimize the amount of time a network is unavailable tousers following a switchover.","It is supported by the implementation of EIGRP， OSPF， RIPv2， and BGP protocols.","It synchronizes startup configuration， startup variables， and running configuration.","The main objective of NSF is to continue forwarding IP packets following a switchover.","Layer 2 802.1w or 802.1s must be used， as 802.1d cannot process the Layer 2 changes.","Routing protocol tuning parameters must be the same as the NSF parameters， or failover will beinconsistent."]
要允许可屏蔽中断嵌套，应该在中断子程序中设（）。 ["CLI","STI","EOI","INT21H"]
《铁路旅客运输规程》线路中断，列车不能继续运行时，应妥善安排被阻旅客。车站应将停办营业和恢复营业的信息及时向旅客公告。
软件堆栈占用（），其工作方式为（）。 ["部分ROM，先进先出","部分ROM，先进后出","部分RAM，后进先出","部分RAM，后进后出"]
《铁路旅客运输规程》线路中断，列车不能继续运行时，车站应将停办营业和恢复营业的信息及时向旅客公告。
意外事故
