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How do routers in an IS-IS Level-1 domain exit to reach other Level-1 （L1） domains？（）
A

Level-1（L1） routers use default routes announced by Level-2（L2） routers in Level-1（L1） domain

B

Level-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） router

C

Level-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOS

D

Level-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS

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考题 Routers A and B are connected with a point-to-point OC-3 interface. Each router‘s OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in the same area.How many IS-IS adjacencies exist between the two routers?（）A.0B.1C.2D.3
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考题 How do routers in an IS-IS Level-1 domain exit to reach other Level-1 （L1） domains？（）A、Level-1（L1） routers use default routes announced by Level-2（L2） routers in Level-1（L1） domainB、Level-1 routers use default routes installed based on ATT bit （Attach Bit） in announcements from Level-1-2（L1/L2） routerC、Level-1 routers use specific routes， for other Level-1 domain， announced by Level-1-2（L1/L2） by route-leaking feature of Cisco IOSD、Level-1 routers use specific routes， for other Level-1 domain， announced by Level-2（L2） by route-leaking feature of Cisco IOS
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考题 多选题Which two conditions, when met, allow an IS-IS Level 2 router to be considered attached?（）AYou can reach other Level 2 routers.BIt can reach at least one other defined area.CThe router is reachable by at least two ES-IS nodes.DIt has at least one enabled reachable prefix with a valid metric defined.
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考题 单选题Routers A and B are connected with a point-to-point OC-3 interface. Each router’s OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas.How many IS-IS adjacencies exist between the two routers？（）A 0B 1C 2D 3
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考题 单选题When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?（）A PIM - DMB PIM - SMC PIM - RPD CGMPE IGMP snooping
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