[Sep-2021] Valid Way To Pass Huawei Exam Dumps with H12-221-ENU Exam Study Guide
All H12-221-ENU Dumps and HCIP-Routing&Switching-IERS(Huawei Certified ICT Professional-Implementing Enterprise Routing and Switching Network) Training Courses Help candidates to study and pass the Exams hassle-free!
NEW QUESTION 93
The ABR of totally NSSA area advertises the Type 3 default route to be transmitted to the area. All inter-domain routes must be advertised through the ABR.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 94
The following is the output information of the router RTA. Which of the following description of the output information is correctangle?
[RTA]multicast routing enable
[RTA]pim
[RTA-pim]static-rp 172.16.1.1
[RTA]interface Ethernet0/1
[RIA-Etheernet0/1]pim sm
- A. The router runs multicast, you do not need to enable multicast routing-enable
- B. Router RTA interface Ethernet0/1 runs PIM-DM
- C. Statically specified RP is 172.16.1.1
- D. PIM-DIM mode runs on the router
Answer: C
NEW QUESTION 95
Which statements about OSPF packets are true? (Select 2 answers)
- A. After received LS Update packets, the router must send LSAck for confirming.
- B. Hello packets can be sent immediately after the interface joined OSPF area.
- C. LS Update packets are sent only after an adjacency is established.
- D. LS Update messages synchronize the link state database by sending detailed LSAs.
Answer: B,D
NEW QUESTION 96
About multicast RPF check, which of the following statements is wrong? (Multiple Choice)
- A. Multicast RPF check is not rely on unicast routing.
- B. The router receives the multicast packet but fails the RPF check and discards the received multicast packet.
- C. All multicast protocols use RPF check.
- D. There are two RPF check functions. One is to prevent loops in multicast routes, the other is to prevent forwarding of redundant multicast data packets.
Answer: A,C
NEW QUESTION 97
Which of the following protocol used the SPF algorithm?
- A. OSPF
- B. RIPv1
- C. RIPv2
- D. BGP
Answer: A
NEW QUESTION 98
Which of the following description about the OSPF protocol is wrong?
- A. Link types described by a Router-LSA include 4 types: P2P/TransNet/StubNet/virtual link.
- B. Each OSPF router uses only one Router-LSA to describe the status of local links in an area.
- C. The Link State ID described in the third type of SA is the router-id of the ABR.
- D. Routing information is only allowed to be advertised between backbone areas and non-backbone areas, and routing information is not allowed to be directly advertised between non-backbone areas.
Answer: C
NEW QUESTION 99
Regarding the description of BGP Keepalive message, which is wrong?
- A. Keepalive packets are mainly used for the running status of the peer routers and the availability confirmation of the link.
- B. Keepalive packets are consist of only one BGP data header.
- C. Keepalive is periodically sent between two BGP neighbors.
- D. By default, the keepalive interval is 180s.
Answer: D
NEW QUESTION 100
In OSPF, the selected DR and BDR in the broadcast type network listen for 224.0.0.5 addresses and 224.0.0.6 addresses.
- A. True
- B. False
Answer: A
NEW QUESTION 101
Regarding port isolation, which of the following statement is wrong?
- A. Port isolation is isolation of physical layer.
- B. Port isolation can be isolated based on VLANs.
- C. Port isolation is an access control security control mechanism between switch ports.
- D. Clients wishing to access PCs from different ports cannot communicate with each other, which can achieve through port isolation.
Answer: B
NEW QUESTION 102
The role of the Hello message in PIM-SM is: (Multiple choice)
- A. Election network segment BDR
- B. Register with the RP
- C. Establish and maintain neighbor relationships
- D. Ability negotiation between neighbors
Answer: C,D
NEW QUESTION 103
PIM-DM does not rely on a specific unicast routing protocol but uses an existing unicast routing table for RFF checking.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 104
IGMPv1 stipulates that when there are multiple routers in the shared network, the IGMP protocol itself selects the querier.
- A. False
- B. True
Answer: A
NEW QUESTION 105
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. True
- B. False
Answer: A
NEW QUESTION 106
As shown in the figure, Router ABR1 (Router ID: 100.0.0.22) imports a RIP route 10.0.0.0/24. Viewing the LSDB of router RT1 has the ASE LSA with an LS ID of 10.0.0.0 generated by ASBR1, but the routing table of RT1 does not have a corresponding route.
The possible causes are: (Multiple choices)
- A. Router ABR2 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 0.
- B. Router ABR1 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 0.
- C. Router RT1 does not have an OSPF external (ASE) route to the forwarding address 100.1.1.9.
- D. Router ABR3 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 1.
- E. Router RT1 does not have an OSPF Inter-area route to the forwarding address 100.1.1.9.
- F. Router ASBR1 does not generate ASBR SUMMARY LSA with LS ID 100.0.0.22 to Area 2.
Answer: B,D,E
NEW QUESTION 107
Use the OSPF vlink-peer command to configure a virtual connection. The peer router-id is specified.
- A. True
- B. False
Answer: A
NEW QUESTION 108
Regarding the description of the BGP state machine, the error is:
- A. In the Active state, BGP will attempt to establish a TCP connection, which is the intermediate state of BGP.
- B. In the Established state, BGP peers can exchange Update packets, Route-refresh packets, Keeplive packets, and Notification packets.
- C. The status of both BGP peers must be OpenConfirm. The BGP neighbor relationship can be established. The two parties exchange routing information through Update packets.
- D. In the Idle state, BGP rejects any incoming connection requests and is the initial state of BGP.
Answer: D
NEW QUESTION 109
The MUX VLAN provides a mechanism for controlling network resources through VLANs. which of the following concepts do not belong to the MUX VLAN?
- A. Slave VLAN
- B. Guest VLAN
- C. Primary VLAN
- D. Interworking VLAN
Answer: B
NEW QUESTION 110
The following is a section on the configuration of the master VLAN and the slave VLAN in the MUX VLAN. Which of the following about this configuration is correct? (Multiple Choice)
- A. VLAN 10 is the host VLAN
- B. VLAN 12 is an isolated slave VLAN
- C. Both VLAN 10 and VLAN 11 are MUX VLANs.
- D. VLAN 11 is the host VLAN
- E. Both VLAN 11 and VLAN 12 are slave VLANs
Answer: A,B,E
NEW QUESTION 111
About the description of P2MP networking, which is correct? (Multiple Choice)
- A. Devices with inconsistent mask lengths on the P2MP network cannot establish neighbor relationships. However, you can use the ospf p2mp-mask-ignore command to break this limitation.
- B. The election of DR/BDR is required in the P2MP network.
- C. No link layer protocol is P2MP by default. P2MP must be forcibly changed by other network types.
- D. You can use the filter-Isa-out peer command to filter the sent LSA on a P2MP network
Answer: A,C,D
NEW QUESTION 112
The difference between the PIM-SM protocol and the PIM-DM protocol is: (Multiple Choice)
- A. PIM-SM has RPT and SPT trees, while PIM-DM only has SPT trees.
- B. The BSR/RP exists only in the PIM-SM network, but not in the PIM-DM.
- C. PIM-SM assumes that there are a small number of recipients in the network, while PIM-DM assumes that there are a large number of recipients in the network.
- D. PIM-SM can implement on-demand forwarding. There is no redundant traffic in the network, and PIM-DM periodically floods, and there is no redundant traffic in the network.
Answer: A,B,C
NEW QUESTION 113
Which of the following BGP reliable routing updates is correct?
- A. BGP works on the transport layer and the UDP protocol number is 179.
- B. BGP sends complete routing table information for each route update.
- C. BGP does not require periodic updates.
- D. BGP uses multicast updates.
- E. The BGP sends an OPEN packet to detect TCP connectivity.
Answer: C
NEW QUESTION 114
Which of the following is true about BGP, OSPF, ISIS and RIP?
- A. RIP runs on the UDP session and uses a port number of 179.
- B. BGP neighbor relationship based on the establishment of TCP session
- C. ISIS runs on the basis of the IP protocol and uses the protocol number 89.
- D. OSPF runs on the basis of the IP protocol and uses the protocol number 90.
Answer: B
NEW QUESTION 115
The description of LACP protocol, which is correct? (Multiple choices)
- A. The device at both ends determines the active interface based on the passive interface LACP priority and interface ID.
- B. Interact with the peer through the Link Aggregation Control Protocol Data Unit (LACPDU).
- C. Based on the IEEE802.3au standard.
- D. The device at both ends determines the active end based on the system LACP priority and system ID.
Answer: B,D
NEW QUESTION 116
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