H12-831 Online Practice Questions and Answers

Regarding multi-instance CE (Mlulti-VPN-Instance CE, MCE), which of the following descriptions is wrong?

A. existMCEdevice needs to be differentVPNCreate their own routing table and bind to the correct interface

B. connected to the sameMCEbut not oneVPNInstance users cannot access each other

C. haveMCEfunctional devices can be found inBGPIMPLS IP VPNAccess to multiple applicationsVPNExample, reduce the investment of user network equipment

D. MCEandPEThere must be multiple physical links betweenVPINIsolation between instances

After a fault occurs, you need to collect and back up various types of fault information in time as a reference for troubleshooting. In addition, when seeking emergency assistance from Huawei Technologies Co., Ltd.

A. True

B. False

The default MPLS label publishing mode, label distribution control mode and label retention mode of Huawei routers are respectively

A. Label release method - downstream autonomous methoD. label distribution control method - free methoD. label retention method - independent

B. Label release method - free methoD. label distribution control method - independent methoD. label retention method - downstream autonomous method

C. Label release method - downstream autonomous methoD. label distribution control method - independent methoD. label retention method - free method

D. Label release method-independent methoD. label distribution control method-free methoD. label retention method-downstream autonomy

IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?

A. If you want IPv4 and IPv6 network computation to form the same shortest path tree, you need to run the ipv6 enable topology ipv6 command to enable the IPv6 capability in the IS- IS process.

B. By default, since R2 does not support IPv6, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R3-R4

C. By default, IPv4 and IPv6 networks will be calculated separately to form different shortest path trees

D. By default, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R2-R4. Since R2 does not support IPv6, R2 will directly discard IPv6 packets after receiving them, causing traffic loss.

There is a concept of forwarding equivalence class (FEC-Fowarding Equivalence Class) in MPLS, so FEC does not. Can the allocation be made based on which of the following criteria?

A. Service type(Class of Service) BsFragment offset (Fragment office)

B. Application protocol(Application Protocol)

C. target address(Destination Addess)

As shown in the figure, an engineer uses 4 routers to test branch network interoperability. Among them, R1, R2, and R3 in branch 1 deploy OSPF to implement network interoperability. R2, R3, and R4 in branch 2 deploy IS-S to implement network interoperability. Now the engineer wants to implement R1 to access the loopback interface address of R4. Which of the following operations can meet this requirement?

A. existR2ofOSFFprocess neutralizationIS-ISDuring the process, the default route is advertised separately

B. No configuration required

C. only atR2ofIS-ISDuring the process, the default route is advertised

D. only atR2ofOSPFDuring the process, the default route is advertised

Which of the following BGP routing attributes cannot control BGP routing?

A. MED

B. AS Path

C. Community

D. Originator ID

Part of the configuration of R1 is as follows. Which statement about OSPF on R1 is correct? ospf 1 router-id 172.16.1.1 area 0.000 network 10.1.12.1 0.0.0.0 network 10.1"3"0.0.0.0 network 172.16/1 1 0.0.0.0 ospf 2 vpn-instance tt area QQO.O network 10J J 1 0.000

A. VRF ttThe routing information will appear inOSPFprocess1in the routing table

B. process1and process2ofOSPF LSD8within its areaLSAinconsistent

C. process1and process2ofOSPF-LSDBits area0InsideLSAexactly the same

D. VRFttThe routing information will not be available nowOSPFprocess1in the routing table

The security protection actions that a secure MAC address can perform does not include which of the following?

A. Protect

B. Restrict

C. Shutdown

D. Remark

In PLSVPN, in order to distinguish IPv4 prefixes that use the same address space, the value of R0 is added to the IPv4 address. The correct description of the following options is:

A. On a PE device, each VP instance corresponds to a value of 0. On the same PE device, the RD value must be unique.____, ____, ____.

B. RD can be used to control the publication of 1 routing information

C. RD is encapsulated in Update message as BGP extended community attribute during delivery

D. After the PE receives the IPv4 route from the CE, it adds RD to the IPv4 route to convert it into a globally unique VPN-IPv4 route, and publishes it on the public network