If an administrator wants to manage certain routes on the router during operations, the following tools are listed below. These routes can be flagged so that administrators can configure policies

• A.Use ACLs to tag routes on the router.
• B.Use the Tag value to mark the route on the router.
• C.Use ipprefix to tag routes on the router.
• D.If the BGP protocol is running, the route is marked with the community attribute

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As shown in the figure, private network routing information is exchanged between PEl and PE2 and their respective CE via OSPF, and the same is configured on PEI and PE2 Domain D.
When routing is introduced from BGP to OS9PF on PE2, the following limited types of LSAs may be passed to E2?

• A.Type7 LSA
• B.Type3 LSA
• C.Type5 LSA
• D.Type1 LSA

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As shown in the figure, the neighbor relationship between R1 and R2 has just been established, and the database synchronization process between R1 and R2 is correct.

• A.The message sent by R1 to R2 is a PSNP message
• B.R1 sends the packet of R2 as the CSNP packet. The message sent by
• C.R1 to R2 is an LSP packet. The message sent by
• D.R1 to R2 is the Hello message.

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If you have a Huawei switch running the STP protocol, and now connect the GO/O/17 interface and the GO/O/18 interface of the switch through a cable, then the scenario described below is correct ?( Single choice questions).

• A.GO/0/18 interface will enter the Disking state
• B.The GO/0/18 interface will continuously change back and forth between the Listening state and the Learning state
• C.Both the Go/0/17 interface and the G0/0/18 interface enter the Disccarding state
• D.Both the G0/0/17 interface and the GO/0/18 interface enter the Forwarding state
• E.The Go/0/17 interface enters the Blocking state

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The following description of ISIS's routed infiltration is correct?( Multi-select)

• A.Route penetration for ISIS can be deployed on Level-1 routers.
• B.ISIS routing penetrates | Can be used in Pv6 environments.
• C.Route penetration of ISIS does not cause neighbor concussions.
• D.Route infiltration of ISIS is used to prevent routing loops.
• E.Route penetration for ISIS does not include aggregated routes.

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