In the network shown in the figure, OSPF protocol is run between R1, R2, and R3 . IBGP neighbor relationship is established between R1 and R3 using loopback interface. If OSPF is disabled on R2’s GE0/0/1 interface through the "undo network xxxx yyyy" command, and BGP neighbor relationship is checked on R1, by default, the longest time for R1’s BGP neighbor relationship to change from Up state to Down state is which of the following?

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In the network shown in the figure, OSPF protocol is running between R1, R2, and R3, and OSPF BFD feature is enabled. IBGP neighbor relationship is established between R1 and R3 using loopback interface. If GE0/0/1 interface of R2 is shut down, and BGP neighbor relationship is checked on R1, by default, which of the following is the longest time for R1 BGP neighbor relationship to change from Up state to Down state?

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In the network shown in the figure, OSPF runs between R1, R2, and R3. R1 and R3 use the loopback interface to establish an IBGP neighbor relationship, and the BFD function is enabled in the BGP process. The BFD parameters are "bfd min-tx-interval 1000 min-rx-interval 1000 detect-multiplier 6". If OSPF is disabled on R2’s GE0/0/1 interface through the "undo network xxxx yyyy" command, and the BGP neighbor relationship is checked on R1, by default, the longest time for the R1 BGP neighbor relationship to change from Up to Down is which of the following?

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Which of the following is not included in the OSPF Hello message?

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A large Internet service provider needs to shut down the equipment in the computer room for maintenance in batches. As a cutover project manager, which of the following time points would you prefer?

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By default, the cost type of IS-IS routes is narrow mode. In this mode, the maximum value of the route cost is which of the following?

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Which of the following commands can be configured on an IS-IS Level-1-2 device to prevent the Level-1 device from generating a default route?

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When an OSPFv3 message is encapsulated in an IPv6 message, which of the following is the value of the Next Header field in the IPv6 message header?

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By default, the IS-IS LSP refresh interval is which of the following?

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The "set-overload" command is configured in the process of an IS-IS router. By default, how long does it take for the router to exit the overload state after restarting?

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