Generally, large-scale and important cutover projects require setting up an environment in the laboratory for advance verification, which is called laboratory testing. Successful laboratory testing means that the cutover plan is feasible and there is no need to meet with the customer for review.

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If the users connected to the switch change frequently, you can convert the dynamic MAC address to a sticky MAC address through port security. In this way, when the user changes, the bound old MAC address table entry can be cleared in time through the aging of the table entry.

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In the MPLS network, the administrator deploys end-to-end QoS function at the same time. Then the penultimate hop device in the MPLS network can pop out the MPLS label based on the PHP feature, so that the Egress can process the message based on the QoS priority of the inner message.

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When a network engineer logs in to a NetEngine AR6120 through the console port, he finds that the password is wrong and cannot log in. If the device can still be logged in through the Telnet account and the user account has the permission to change the console port password, he can log in to the device through Telnet and change the console port password.

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In the OSPF network shown in the figure, the area numbers are marked in the figure, where area 1 is the Stub area, area 2 is the Totally NSSA area, and area 3 is the NSSA area. If R5 introduces an external route 10.0.5.5/32, which of the following routers do not have a route entry for 10.0.5.5/32 in their routing tables? (Multiple choice)

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Use "display ospfv3 peer verbose" to view OSPFv3 neighbor information. In the output information, you can see the peer’s Router ID, the global unicast address of the peer’s interface, the neighbor’s status, and other content.

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Trap information is a notification generated by the system when a fault is detected. It mainly records system status information such as faults. If the network administrator wants to view Trap information through the command line, the SNMP agent function must be enabled first.

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In the OSPFv3 network shown in the figure, area 1 is an NSSA area. R1 enters external route 2000::1/128 into OSPFv3.

By default, which of the following types of LSAs does not exist in area 1?

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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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In the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interconnected ports of R1, R2, and R3, and all are configured with IPv6 global unicast addresses. Then R1, R2, and R3 will all generate Intra-Area-Prefix-LSA.

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