Huawei HCIE-R&S H12-261-ENU practice questions

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Share some HCIE-R&S H12-261-ENU exam questions and answers below.

In multicast networks, what conditions will lead to forward the multicast traffic failure? (Please select three correct answers)
A. the router doesn't have RPF routing
B. there is no enabling PIM on the RPF interface
C. upstream router will discard the received PIM Join message
D. the receiver router discarded the received IGMP join message
Answer: ABC

There is a network composed by router R1, router R2, router R3 and router R4. The four routers are interconnected by a LAN network. All four routers deploy the basic OSPF. When you are executing the command "display ospf peer" on Router 2, you will find the status between Router2 and Router3 is "2-way".
So from this output, what conclusion can you draw?(please select 2 correct answers)
A. the router R2 is DR or BDR
B. router R3 is neither DR, nor the BDR
C. router did not form a full adjacency relationship between R2 and R3 router
D. router R2 is not DR
E. the router R4 is DR
Answer: BD

A workstation connected to an Ethernet switch of the workgroup via over Category 5 cable. Workstations can access the whole network through the switch (ie, fully connected), but much lower access rates than desired. When viewing the switch interface statistics, we can detect a lot of "ultra-small frame." When software reading the statistics information of the workstation network card, we found many FCS and frame alignment error.
What reason is likely to lead to the generation of these errors?
A. network interface card on the workstation has been corrupted
B. Line between the workstation and the switch has been damaged
C. Interface mismatched to be 802.1q trunk interfaces
D. the speed between workstations and switches mismatch
E. the working mode between workstation and switch mismatch
Answer: E

You are the administrator of HW network devices. The network contains a primary node and a plurality of remote nodes. Your network carrying VoIP traffic and data traffic in the network need to deploy QoS. You agree with your carrier on the basis of differentiated services RFC to classify VoIP and data traffic.
Which of the following description is reasonable?
A. The data traffic DSCP is set to AF21, VoIP DSCP set to EF
B. set the VoIP DSCP to AF31, data traffic DSCP is set to EF
C. set the data traffic DSCP to AF51, VoIP DSCP to EF
D. data traffic DE bit, VoIP CLP bit
E. set the data traffic IP precedence to 5, VoIP DSCP to EF
F. None of the above is correct
Answer: A