Updated Feb 27, 2022 H12-221-ENU Exam Dumps - PDF Questions and Testing Engine
New (2022) Huawei H12-221-ENU Exam Dumps
NEW QUESTION 189
In an OSPF routing domain, on a broadcast network and an NBMA network that contain at least two routers, one router must be designated as a DR and the other as BDR.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 190
BGP neighbors are neighbor relationships established through UDP.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 191
For IPv4, report the address space of the SSM range allocated by IANA, which of the following addresses are legal?
- A. 225. 137. 1. 1/8
- B. 192. 168. 1. 1
- C. 232. 137. 1. 1/8
- D. 232. 137. 1. 1/24
Answer: C
NEW QUESTION 192
The correct description of the LSA is:
- A. The combination of LS type, Link State ID and LS sequence number identifies one LSA together.
- B. The combination of LS type, LS sequence number and Advertising Router identifies one LSA together.
- C. The combination of LS type, Link State ID and Advertising Router identifies one LSA together.
- D. The combination of LS sequence number, Link State ID and Advertising Router identifies one LSA together.
Answer: C
NEW QUESTION 193
By default, the SSM group is in the range of 232.0.0.0/8. If you want to modify the SSM group range, which of the following is correct?
- A. Configure the ssm-policy acl-number in the PIM view.
- B. Configure the ssm-policy advanced-acl-number in the PIM view.
- C. Configure the ssm-policy acl-number in the system view.
- D. Configure the ssm-policy advanced-acl-number in the system view.
Answer: A
NEW QUESTION 194
Given the configuration of RTA below, which of the following description about the configuration is wrong? (Multiple choice)
- A. The router listens to the multicast address 224.0.0.2 by default.
- B. Use the igmp enable command to enable IGMP on the interface. If you do not configure the multicast routing-enable command first, igmp enable can be used as usual.
- C. IGMP version supported by this interface is version 2. If this command is not configured, the interface runs IGMPv1 by default.
- D. multicast routing-enable command is to enable multicast. If this command is not configured, the router does not forward multicast packets.
Answer: B,C
NEW QUESTION 195
Thedescription about OSPF features, which is wrong?
- A. OSPF uses the link state algorithm.
- B. Each router advertises local link state information through flooding LSAs.
- C. The LSDB of all routers in OSPF area 0 are the same.
- D. According to the directed graph, each router uses the SPF algorithm to calculate a shortest path tree rooted at itself. This tree gives the routes to each node in the autonomous system.
- E. Each OSPF device collects the LSA which sent by other routers. All the LSA are put together to form the link state database LSDB.
Answer: C
NEW QUESTION 196
The following is description of the OSP neighbor relationship and adjacency relationship. Which is correct?
- A. Not all neighbor relationships can be adjacencies.
- B. Neighbor relationship is a relationship formed by adjacency to exchange routing information.
- C. OSPFi routers must establish adjacencies before exchanging information.
- D. The adjacency is maintained by OSPF's HELLO protocol.
Answer: A
NEW QUESTION 197
The above is the output information of router. The neighbor relationship between the router and the neighbor 2.2.2.2 is in the Adroe state analysis. Which of the following is the most likely reason?
- A. It may be due to not receiving the other party's update message.
- B. It may be TCP port 179 is disabled.
- C. It may be due to not receiving the KEEPALVIE packet from the other party.
- D. It may be due to a problem with OPEN negotiation.
Answer: B
NEW QUESTION 198
In multicast network environment, if IGMPv2 hosts and IGMPv1 routers (hereinafter referred to as version 2 host and version 1 router) are co-located on the same LAN, how do they work together?
- A. When version 2 host leaves, it still sends an IGMP leave message, and the message can't be suppressed.
- B. When version 1 router is a valid IGMP querier, the version 2 host must send an IGMPv1 report.
- C. When Version 2 host detects that the IGMP Querier is Version 1 router, it must always respond with the IGMPv1 report.
- D. version 1 router treats the IGMPv2 report as an invalid IGMP message type and ignores it.
Answer: B,C,D
NEW QUESTION 199
The OSPF NBMA network type requires that routers in the network must select DR and BDR; otherwise, they can't work.
- A. False
- B. True
Answer: A
NEW QUESTION 200
About the description of static LACP mode, which of the following statement is wrong?
- A. If preemption is enabled, the high-priority backup interface becomes an active interface within a certain period after the active interface fails. If preemption is not enabled, the faulty interface cannot automatically become an active interface.
- B. In the static LACP mode, the higher the interface LACP priority is, the higher the priority is, and the easier it is to be selected as an active port.
- C. When you need to provide a large link bandwidth between two directly connected devices and the peer device does not support LACP, you can choose to use the manual load balancing mode.
- D. In static LACP mode, the interface that forwards data is called the active interface, and the interface that does not forward data is called the inactive interface. Only when the active interface fails, the back-up interface can be changed from an inactive interface to an active interface.
Answer: B
NEW QUESTION 201
Which description is wrong about BGP Keepalive message?
- A. Keepalive is periodically sent between two BGP neighbors.
- B. Keepalive messages are mainly used for the running status of peer routers and the availability confirmation of links.
- C. Keepalive messages consist of only one BGP data header.
- D. By default, the keepalive interval is 180s.
Answer: D
NEW QUESTION 202
What is wrong description of the working mode of PIM below?
- A. PIM-SM
- B. PIM-ASM
- C. PIM-DM
- D. PIM-SSM
Answer: B
NEW QUESTION 203
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 device running STP will discard when it receives the configuration BPDU of RSTP.
- C. In the flag field, Bito is TCA.
- D. The flags field uses the middle 6 bits that were originally reserved. The changed configuration BPDU is called RST BPDU.
Answer: A,B,D
NEW QUESTION 204
The ABRs in an OSPF stub area do not flood Type 5 LSAs, Type 4 LSAs, and Type 3 LSAs into the Stub area. Therefore, the Stub area does not have AS external routing capabilities. The ABR in the Stub area advertises a default route to the area to guide the data. How the package reaches the destination outside the AS.
- A. False
- B. True
Answer: A
NEW QUESTION 205
OSPF supports multiple processes that can run multiple different OSPF processes on the same router, and they are independent of each other. Routing interactions between different OSPF processes correspond to routing interactions between different routing protocols.
- A. True
- B. False
Answer: A
NEW QUESTION 206
Which of the following description of OSPF features is correct?
- A. OSPF is in the broadcast network. All routers form adjacencies.
- B. The OSPF area boundary is on the link.
- C. Generally, all non-backbone areas of OSPF must be connected to the backbone area.
- D. If one LSA must age, any router can advertise LSA aging messages.
Answer: C
NEW QUESTION 207
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