Free Access Huawei.H12-891_V1.0.v2022-07-04.q121 Practice Test (Page 15)

Question 66

What is the following description of MPLS incorrect?

A.The tag space range of dynamic signaling protocols such as LDP, M P-BGP is 16 to 1023

B.The length of the MPLS tag is 20 to 20 for packet forwarding.

C.MPLS supports multi-layer label nesting, and the S bit value of the innermost label is 1.

D.When using the TTL processing method of Pipe mode, the IP packet transmits the TTL of the IP packet over the IPLS network. The value is only minus 1 for the MPLS in and out nodes.

Question 67

A.When a packet with a destination address of 2 is sent , it is sent without labeling.

B.When sending a packet with a destination address of 3333, label 1026 and send it.

C.When sending a packet with a destination address of 4444, it is sent without labeling.

D.When the router receives a packet with the label 1024, it replaces the label with 1027 and sends it.

Question 68

RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are ?

A.The multicast network dynamically elects the RP instead RTA failed RPF check for BSR

B.The RP elected by RTA is not an RTB

C.RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source

D.Multicast network statically configures RP, while RTA router does not statically configure RP

Question 69

Although the STP protocol can solve the loop problem, it affects the quality of user communication due to the slow convergence of the network topology. RSTP has made many improvements to STP, which of the following is not an improvement of RSTP to STP?

A.In addition to the 3 port states, RSTP vice adds 2 new port roles

B.Non-root switches running RSTP send configuration BPDUs at intervals specified by Hello Timer, a behavior that is entirely autonomous for each device

C.RSTP port state specification is divided according to whether the port forwards user traffic and learns the MAC address, reducing the original 5 port states to 3

D.If a port does not receive a configuration BPDU sent by the upstream device for 4 consecutive Hello Time, the device considers the negotiation with this neighbor to fail

Question 70

Huawei's SDN controller using VXLAN technology is fixed?

A.Agile Controller-WAN

B.Agile Controller-DCN

C.Agile Controller-Campus

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Question 66

Question 67

Question 68

Question 69

Question 70

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