H31-161 Braindumps Real Exam Updated on Dec 01, 2021 with 180 Questions
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Huawei H31-161 Exam Syllabus Topics:
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NEW QUESTION 39
Which of the following statements about the L2VPN are true?
- A. When providing the MPLS L2VPN service for enterprise users, the carrier must filter user route advertisements. Otherwise, flapping of user routes may lead to flapping of network routes.
- B. When a traditional L2VPN (ATM and FR) is upgraded to an MPLS L2VPN, the network topology does not need to be adjusted.
- C. On a L2VPN, routing information of users does not need to be maintained or managed.
- D. If the length of a L2VPN packet that arrives at a P node exceeds the maximum transmission unit (MTU) of relevant interfaces of the P node, the packet will be fragmented and then forwarded.
Answer: B,C
NEW QUESTION 40
#
interface Ethernet6/1/1
ip address 40.1.1.4 255.255.255.0
igmp prompt-leaveigmp enable
pim sm
#
IGMP interface group report information of VPN-Instance: public net
Ethernet6/1/1(40.1.1.4):
Total 1 IGMP Group reported
Group: 224.1.2.3
Uptime: 00:00:32
Expires: 00:04:38
Last reporter: 30.1.1.30
Last-member-query-counter: 0
Last-member-query-timer-expiry: off
The preceding information shows the configurations of Ethernet 6/1/1 and entries created based on received IGMPv2 Report messages. Which action does Ethernet 6/1/1 perform after receiving Leave messages for group 224.1.2.3?
- A. Deletes the record of group 224.1.2.3.
- B. Sends group-specified query messages for group 224.1.2.3.
- C. Neither A nor B is correct.
- D. Both A and B are correct.
Answer: A
NEW QUESTION 41
RTA is a leaf router that directly connects to host A through interface GigabiteEthernet 1/0/0. The interface is
configured as follows:
Hos a sends a IGMPv2 Report message to group 2321.2.3. Which entry can be displayed by the displayed by
the igmp ssm-mapping group command?
- A. (10.10.1.1, 232.1.1.1)
- B. (10.10.1.1, 232.1.1.) and (10.10.1., 2321.2.3)
- C. (10.10.1.1, 232.1.2.2)
Answer: C
NEW QUESTION 42
Which functions does the bearer network NMS mainly provide?
- A. Packet loss delay
- B. Monitoring device load(CPU and Memory)
- C. Monitoring network traffic
- D. Switchover time of a device's active/standby system
Answer: A,B,C
NEW QUESTION 43
As shown in the figure, the primary tunnel uses the path RTA -> RTB -> RTC. There are two FRR paths: One protects the link between RTA and RTB and the other one protects the link between RTB and RTC.If a path in the primary tunnel is faulty, which command can be used on RTA to locate the fault?
- A. display mpls lsp verbose
- B. display mpls te tunnel verbose
- C. display mpls te tunnel-interface
- D. display mpls te tunnel path
Answer: D
NEW QUESTION 44
Exhibit:
As shown in the figure, RTA connects to RTB and RTC A TE tunnel is configure on RTA to reach RTC. The TE tunnel cannot be successfully established. However, CSPF-based calculation is successful and RTA does not receives any PathErro messages. What are possible causes?
- A. The reserved bandwidth is insufficient at interface RTB-2
- B. Different authentication keys are configured on interface RTB-2 and RTC-1.
- C. An interface address on RTP is the same as the address of interface RTA-1.
- D. RSVP-TE is not configured at interface RTB-2.
Answer: A
NEW QUESTION 45
In the inter-AS multicast, which statement about transmitting MSDP SA messages is false?
- A. The router checks the RPF after receiving SA messages.
- B. SA messages can be transmitted only between RPs in different PIM networks.
- C. The SA message contains the multicast source and group information
- D. The router uses the SA cache to store SA messages.
Answer: B
NEW QUESTION 46
OSPF BFD helps fast detect neighbor down events. OSPF BFD can be in which of the following states?
- A. Established
- B. Attempt
- C. Up
- D. Init
- E. Down
- F. 2-way
Answer: C,D,E
NEW QUESTION 47
As shown in the figure , CE and CE 2 belong to VPN A, CE 3 and CE 4 belong to VPN B, VPN A and VPN B share the public network tunnels between border PE 1 and PE 2, and LDP tunnels are configured between PE 1 and PE 2. To isolate resources for VPN service data from PE 2 to PE 1, a unidirectional TE tunnel is configured t forward data from PE1. The QoS policy propagation though the border gateway protocol (QPPB) feature is configured on PE 2, and a QoS policy is defined when VPNs are bound to tunnel interfaces.
Which of the following statements about the configurations on PE 2 are true?
- A. The mpls te cspf command must be configured in the global MPLS view.
- B. The mpls te commit command must be configured on the Tunnel1/0/0 interface,
- C. The maximum reserved bandwidth must not exceed the bandwidth of the tunnels.
- D. The mpls te commit command must be configured on the Post/0/0 interface.
- E. The maximum reserved bandwidth must not exceed the bandwidth of the physical links.
Answer: A,B,E
NEW QUESTION 48
With the IPSec technology , which of the following description is true?
- A. AH provides Data encryption
- B. ESP provides authentication service
- C. IPSec delivers service for transmission layer
- D. ESP is more simple than AH
Answer: B
NEW QUESTION 49
Exhibit.
The preceding information shows the configurations of Ethernet 6/1/1 and ensure created based on received
IGMPv2 Report messages. Which action does Ethernet 6/1/1 after receiving Leave messages for group
224.1.2.3?
- A. Sends group-specific query messages for group 224.1.2.4
- B. Deletes the record of group 224.1.2.3
Answer: B
NEW QUESTION 50
Which statement about the Ethernet clock synchronization technology used m actual solutions is true?
- A. The IEEE 1588 technology requites the intermediate node to support transparent clock transmission
- B. The NTP technology requires the intermediate node to support transparent clock transmission
- C. The 802 1aS technology requires the intermediate node to support transparent clock transmission
- D. The CES packet recovery technology requires the intermediate node lo support transparent clock transmission
Answer: A
NEW QUESTION 51
Which of the following statements about the destination addresses of packets and the Router Alert option are true?
- A. The PathTear message without the Router Alert option is sent to the next hop.
- B. The Path message carrying the Router Alert option is sent to the egress node.
- C. The Resv message carrying the Router Alert option is sent to the ingress node.
- D. The ResvTear message without the Router Alert option is sent to the previous hop.
Answer: B
NEW QUESTION 52
Which of the following combinations of LDP working modes supports LDP FRR?
- A. Downstream on-demand label distribution + ordered label control + conservative label retention
- B. Downstream independent label distribution + independent label control + conservative label retention
- C. Downstream independent label distribution + ordered label control + free label retentionB.Downstream on-demand label distribution + independent label control + free label retention
Answer: C
NEW QUESTION 53
Which statement about the MPLS LSP traceroute is true?
- A. The egress route sends back an reply packet containing the downstream mapping TLV if the receives
Echo request contains the downstream mapping TLV. - B. The downstream mapping TLV is used to carry downstream information of the correct node.
- C. Echo request route sends by the LSP traceroute can cay multiple downstream mapping TLVs.
- D. The destination IP address ifan Echo request sent by the LSPtraceroute is the IP address of the
corresponding FEC.
Answer: C
NEW QUESTION 54
RTA is a leaf router that directly connects to host A through interface GigabitEthernet 1/0/0. The interface is configured as follows:
interface GigabitEthernet1/0/0
undo shutdown
ip address 192.168.4.2 255.255.255.0
pim sm
igmp enable
igmp version 3igmp ssm-mapping enable
igmp static-group 232.1.1.1
Configurations in the IGMP view are as follows:
igmp
ssm-mapping 232.1.1.0 255.255.255.0 10.10.1.1
ssm-mapping 232.1.2.0 255.255.255.0 10.10.1.1
Host A sends an IGMPv2 Report message to group 232.1.2.2. Which entry can be displayed by the display igmp ssm-mapping group command?
- A. (10.10.1.1, 232.1.2.2)
- B. (10.10.1.1, 232.1.1.1) and (10.10.1.1, 232.1.2.2)
- C. No entry
- D. (10.10.1.1, 232.1.1.1)
Answer: B
NEW QUESTION 55
On the typical access network of a bearer network, a core network device connects to two upstream CEs. CEs connect to PEs in a square shape. This access network must bear voice and signaling services. A CE must be configured with two VPNs to separate the voice and signaling services and ensure high security and QoS. The signaling service works in active/standby mode, and the voice service works in load sharing mode. The VRRP must be enabled between the CEs to terminate the signaling flow. If the network robustness is ensured and the network architecture is rational, which of the following statements about the topological structure are true?
- A. The voice service must be carried by GE links and the signaling service must be carried by FE links.
- B. Instead of POS links, GE links are recommended between CEs and PEs.
- C. The total link bandwidth between CEs cannot be less than that between CEs and PEs.
- D. GE and FE links need to be used as the Eth-trunk between CEs to improve reliability.
Answer: A,B,C
NEW QUESTION 56
Which statement about the interworking between a VPN and the Internet is false?(D)
- A. A VPN and the Internet can interwork through the CE or PE.
- B. A VPN and the Internet can interwork through the PE, Internet gateway, or CE.
- C. For a VPN and the Internet to interwork, network address translation (NAT) must be performed. NAT can be deployed on the interface of a PE used to connect to the Internet gateway, on the interface of a PE used to connect to a CE, or on the interface of a CE used to connect to a PE.
- D. For a VPN and the Internet to interwork, the user device used to access the Internet must have a route to the desired address on the Internet and a backhaul route.
Answer: C
NEW QUESTION 57
As shown in the figure, for SWA, Eth0/2 belongs to VLAN 2, and Eth0/24 (PVID = 2) is a trunk interface and permits packets from VLAN 2 and VLAN 3 to pass through; for SWB, Eth0/2 belongs to VLAN 2, Eth0/3 belongs to VLAN 3, and Eth0/24 (PVID) is a trunk interface and permits packets from VLAN 2 and VLAN 3 to pass through. Which statement is true?
- A. PC A can ping both PC B and PC C.
- B. PC A can ping neither PC B nor PC C.
- C. PC A can ping PC B instead of PC C.
- D. PC A can ping PC C instead of PC B.
Answer: D
NEW QUESTION 58
The Huawei router is the hop RD where the SSM mapping function is enabled at the interface. Some IGMPv2 hosts expect to receive (1.0.01,232.1.0.1) (1.0.0.1232.1.0.2), and (2.0.0,232.1.3.2) dat a. How can you satisfy the preceding requirement with the least configurations?
- A. ssm-mapping 232. 1.0. 2. 32. 1. 0. 0. 1
- B. ssm-mapping 232. 1. 0. 0. 24. 1. 0. 0. 1
- C. ssm mapping 232.1.3.1.24.2.0.0.1
- D. ssm-mapping 232. 1 308 2 00.1
- E. ssm-mapping 232 1.0. 1 32. 1. 0. 0. 1
- F. ssm-mapping 232.1.3.2 16.2.0.0.1
Answer: D
NEW QUESTION 59
As shown in the figure, the mapping between links and administrative groups is as follows:
0x0F for A -> B; 0xFF for B -> C; 0xF0 for A -> C; 0xC3 for B -> D; and 0x3C for C -> D.
It is expected to configure a tunnel (affinity: 0x0C; mask: 0xFF) on node A to connect to RTD. Which path will be created along with the tunnel?
- A. A -> C -> D
- B. A -> B -> C -> D
- C. No path will be created.
- D. A -> B -> D
- E. A -> C -> B -> D
Answer: B
NEW QUESTION 60
An interface sends 300 Mbit/s user BE traffic. The downstream HQoS scheduling is configured at this interface as follows SQ: cir 15 Mbit/s pw 200 Mbit/s FQ. queue be Ipq shaping 10 CQ: port-queue be Ipq shaping shaping-percentage 10 outbound, port shaping 100 How much traffic is at the downstream outbound interface after HQoS scheduling?
- A. 20 Mbit/s
- B. 200 Mbit/s
- C. 100 Mbit/s
- D. 10 Mbit/s
Answer: C
NEW QUESTION 61
Which of the following statements about BFD for MPLS LSP are true?
- A. In BFD for MPLS LSP, LSP Ping is used to negotiate the identifier and parameters of a BFD session.
- B. If MPLS LSPs work in load balancing mode, a BFP session should be triggered on each LSP in principle. Only one BFD session. however, can be initialed for load-balancing MPLS LSPs to an intermediate node In this case, the forwarding path ol BFD packets may be different from what expected. As a result may be reported or missed.
- C. An MPLS LSP may be unidirectional .If BFD packets are transmitted along an MPLS LSP in the forward direction., these packets may be forwarded over IP in the reverse direction. Then the forward and reverse paths of a packet may be different As a result, when a fault occurs on the reverse path, BFD detects and reports the fault even if the MPLS LSP is normal.
- D. BFD for MPLS LSP detects faults only on the forwarding plane. LSP Ping, however, can not only detect faults on the forwarding plane, but also find out inconsistencies between the forwarding plane and the control plain- Therefore, they are often combined for a better fault detection solution.
Answer: B,C,D
NEW QUESTION 62
Which statement describes the delay variation requirement of the voice service for the IP bearer network?
- A. No strict requirement
- B. Bearer network delay variation = 10 ms. Allowed maximum delay variation =20ms
- C. Bearer network delay variation +100 ms, allowed maximum delay variation +200 ms
- D. Bearer network delay variation + 1s
Answer: B
NEW QUESTION 63
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