[2022] New H12-221-ENU exam dumps Use Updated Huawei Exam
Verified H12-221-ENU Dumps Q&As - H12-221-ENU Test Engine with Correct Answers
NEW QUESTION 268
Router ID must be published in OSP
- A. False
- B. True
Answer: A
NEW QUESTION 269
In MSTP protocol, each MST Instance uses the RSTP algorithm alone to calculate a separate spanning tree.
- A. False
- B. True
Answer: B
NEW QUESTION 270
Unicast technology and multicast technology have different advantages when solving the problem of single-point transmission and multi-point reception.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 271
Which of the following is not the basic network type defined by OSPF?
- A. NBMA
- B. Virtual Link
- C. Broadcast
- D. P2MP
Answer: B
NEW QUESTION 272
In the format of configuring BPDU packets, in addition to ensuring that the STP format is basically the same, RSTP made some minor changes. The following description which is correct?
- A. Type field, the configuration BPDU type is no longer 0 but 2
- B. The flags field uses the middle 6 bits that were originally reserved. The changed configuration BPDU is called RST BPDU.
- C. In the flag field, Bito is TCA.
- D. The device running STP will discard when it receives the configuration BPDU of RSTP.
Answer: A,B,D
NEW QUESTION 273
For multicast MAC addresses, which of the following statement is wrong? (Multiple choice)
- A. The multicast MAC address uniquely corresponds to one IP multicast address.
- B. Multiple multicast MAC addresses correspond to 32 IP multicast addresses.
- C. The role of the multicast MC address is to identify the receivers belonging to the same multicast group on the link layer.
- D. The high 24 of multicast NAC address is 00050, the 25th bit is fixed, and the lower 23 of MAC address is the lower 23b of the multicast P address.
Answer: A,D
NEW QUESTION 274
When the Hold Time supported by the two BGP neighbors are inconsistent, the neighbors negotiate the lowest Hold Time interval that the two ends can support.
- A. False
- B. True
Answer: B
NEW QUESTION 275
The default value of the ospf dr-priority command is 1, which ranges from 0 to 255.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 276
Which statements about OSPF packets are true? (Select 2 answers)
- A. After received LS Update packets, the router must send LSAck for confirming.
- B. LS Update messages synchronize the link state database by sending detailed LSAs.
- C. LS Update packets are sent only after an adjacency is established.
- D. Hello packets can be sent immediately after the interface joined OSPF area.
Answer: B,D
NEW QUESTION 277
IS-IS cannot be run on P2MP ( Point to MultiPoint ) .
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 278
It can be used in a variety of routing protocols, set the matching conditions, set the properties after matching, what is the routing selection tool consisting of if-match and apply clauses?
- A. community-filter
- B. as-path-filter
- C. IP-Prefix
- D. route-policy
Answer: D
NEW QUESTION 279
Multicast related protocols which do not include? (Multiple choice)
- A. MBGP
- B. OSP
- C. PIM
- D. DVMRP
- E. MSDP
Answer: A,B
NEW QUESTION 280
The following is part of the output information of the router Huawei. For the output information, which description is wrong?
<Huawei> display pim interface gigabitethernet 1/0/0 verbose
VPN-Instance: public net
Interface: GigabitEthernet1/0/0, 10.1.1.1
PIM version:2
PIM mode: Sparse
PIM state: up
PIM DR: 10.1.1.2
PIM DR Priority (configured): 1
PIM neighbor count:1
PIM hello interval: 30 s
- A. The router gigabitethernet 1/0/0 interface runs PIMv2
- B. PIM-SM running on the gigabitethernet 1/0/0 interface of the router
- C. The DR on this interface is 10.1.1.1
- D. The PIM status of the gigabitethernet 1/0/0 interface of the router is UP.
Answer: C
NEW QUESTION 281
When using manual link aggregation mode, the wrong description of joining member interfaces in the following is:
- A. The Eth-Trunk interface cannot be nested. That is, the member interface cannot be an Eth-Trunk.
- B. Eth-Trunk has two working modes: Layer 2 working mode and Layer 3 working mode. The two working modes are automatically identified and no manual switching is required.
- C. If the local device uses an Eth-Trunk, the peer interface directly connected to the member interface must also be bundled into an Eth-Trunk interface so that the two ends can communicate normally.
- D. An Ethernet interface only can be added to one Eth-Trunk interface. If you need to join other Eth-Trunk interfaces, you must first exit from the original Eth-Trunk interface.
Answer: B
NEW QUESTION 282
The following description of the Hello packet in the PIM protocol, which is wrong?
- A. Only after the router receives the Hello packets from the neighbor, it will accept other PIM control messages or multicast messages.
- B. pim timer hello interval. Configure the interval for sending Hello packets in the interface view. The default period of Hello packets is 30 seconds.
- C. Hello packets are sent in multicast mode and the multicast address is 224.0.0.9.
- D. pim hello-option holdtine interval configure the hello packets timeout value in the interface view.
Answer: C
NEW QUESTION 283
The AS-Path attribute records all the AS numbers that a route passes through from the local to the destination address in vector order. Therefore, the neighboring AS number farthest from the local AS is taken at the time, and the other AS are arranged in order.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 284
Which of the following descriptions about the network command in BGP is wrong?
- A. By default, BGP does not publish any local network routes.
- B. The injected route needs to strictly match the mask length in the IP routing table.
- C. network cannot be used with the corresponding policy.
- D. The route injected through the network must exist in the IP routing table.
Answer: C
NEW QUESTION 285
About the description of LSA for various messages, which is incorrect?
- A. The LS Ack message contains the complete LSA information.
- B. LS Request message only has LS Type, LS ID and Advertising Router.
- C. The LS Update message contains the complete LSA information.
- D. The LSA of the DD type only contains the summary information of the LSA, that is, the LS Type, the LS ID, the Advertising Router, and the FA LS Sequence Number.
Answer: A
NEW QUESTION 286
Two level-1 routers in different areas can form a neighbor relationship.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 287
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