[Q42-Q62] Real Huawei H31-161 Exam Questions [Updated 2022]

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Real Huawei H31-161 Exam Questions [Updated 2022]

H31-161 Exam Dumps Pass with Updated 2022 HCIE-Carrier IP (Written)

Huawei H31-161 Exam Syllabus Topics:

Topic	Details
Topic 1	BRAS user access, IP MAN, IP backbone network, and mobile bearer network architecture MPLS TE features, multicast advanced features
Topic 2	Capability of independently maintaining typical network of carriers Maintain large-scale IP networks
Topic 3	Demonstrate the systematic understanding and good command of the in-depth principles Plan network and technology evolution
Topic 4	Advanced features, and applications of each protocol Plan and design network and services

NO.42 As shown in the figure. CE 1 and CE 3 belong to VPN-A, and CE 2 CE 2 4 belong to VPN-B VPN-target
VPN-A is 111:1 and that of VPN-B is 222:2 users on different VPNs are not allowed to access each other.
Configuration principles are as follows:
On the backbone network VPNs are not connected to a CE, VPN instance need to be configured on the PE,
and an interface on the PE for connecting to the CE must be bounded to a VPN instance. After binding an
interface to a VPN instance, you must configure the IP address of the interface Between PEs, IS-IS is
configured for PE interworking. MPLS basic capabilities and MPLS LDP are configured for MPLS LSP
establishment, and MP-IBGP is configured for VPN route exchange.

How to enable CE 1 to learn routes from AS 64430?

Import IS-IS 200 routes in IS-IS process 100

Import IS-IS 100 routes in IS-IS process 100

Import BGP routes in IS-IS process 100

Import BGP routes in IS-IS process 200

NO.43 Which of the following statements about TE FRR in forwarding adjacency (FA) mode and TE FRR in IGP Shortcut mode are true?

When TE FRR in FA mode is enabled, nodes except the node on which FA is configured can sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. The upstream node assumes the TE tunnel link is normal and therefore it continues traffic forwarding. In this case, the route does not change and an FRR is not triggered.

When TE FRR in IGP Shortcut mode is enabled, nodes except the node on which FA is configured cannot sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. On the PLR, traffic is still forwarded through the bypass tunnel. The upstream node of the PLR cannot sense the TE tunnel interface and does not trigger an FRR.

When TE FRR in IGP Shortcut mode is enabled, nodes except the node on which FA is configured cannot sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. Though the upstream node of the PLR cannot sense the TE tunnel interface, IGP can sense the faulty link. Therefore, the upstream node triggers an FRR.

NO.44 Which of the following reserved IP multicast addresses is the address of all PIM routers?

239.0.0.2

224 0 0.13

224.0.0.2

224 0 0 4

NO.45 On the IP bearer network, different VPN users (VPN A and VPN B) must access the internet through the same
egress. Which of the following schemes can achieve security isolation VPNs and have the best scalability?

Option A

Option B

Option C

Option D

NO.46 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?

An interface address on RTP is the same as the address of interface RTA-1.

RSVP-TE is not configured at interface RTB-2.

Different authentication keys are configured on interface RTB-2 and RTC-1.

The reserved bandwidth is insufficient at interface RTB-2

NO.47 RTA is a provider edge (PE) router. OSPF is deployed between RTA and a customer edge (CE). Which of the following can be used to avoid routing loops when RTA generate an autonomy system-external (ASE) link-state advertisement (LSA) and sends it to the CE?

Configuring the same VPN route tag on the PE

Configuring Shame Link among PEs

Setting DN-bit in the ASE LSA

Configuring the same domain ID on the PE

NO.48 The secure sockets layer (SSL) protocol mainly provides confidentiality and reliability between communication applications. It is found at the transport layer and the application layer, and provides encrypted data transmission. Which of the following protocols are required for encrypted data transmission?

Handshake protocol

Tunnel protocol

Record protocol

Alarm protocol

NO.49 Which statement about the Ethernet clock synchronization technology used m actual solutions is true?

The IEEE 1588 technology requites the intermediate nodeto support transparent clock transmission

The CES packet recovery technology requires the intermediate node lo support transparent clock
transmission

The NTP technology requires the intermediate node to support transparent clock transmission

The 802 1aS technology requires the intermediate node to support transparent clock transmission

NO.50 Refer to the exhibit.

Which statement about Hub & Spoke MPLS VPN is false?
A . If two Spoke sites are connected to the same Spoke PE, they must be assigned to different VPN instances to prevent them from exchanging routing information.
B . The route of traffic from Spoke site 1 to Hub site 2: Traffic enters Hub site 3 through an interface under VPN1-Hub of the Hub PE and is then forwarded to Spoke site 2 through an interface under VPN1-Spoke of the Hub PE.
C . The route of traffic from Spoke site 2 to Hub site 1: Traffic enters Hub site 3 through an interface under VPN1-Spoke of the Hub PE and is then forwarded to Spoke site 2 through an interface under VPN1-Hub of the Hub PE.
D . The Hub PE can advertise aggregate Spoke site routes or default routes to Spoke PEs through VPNv4.
E .Routes advertised by a Spoke PE to Spoke site 1 of the Hub PE may be advertised back by the Hub PE through a VPNv4 neighbor.
Configure VRFs and relevant policies on a PE as follows:
#
ip vpn-instance vrf1
route-distinguisher 100:1
export route-policy vrf1
vpn-target 1:1 export-extcommunity
vpn-target 2:2 import-extcommunity
ip vpn-instance vrf2
route-distinguisher 100:2
import route-policy vrf2
vpn-target 1:1 3:3 export-extcommunity
vpn-target 1:1 3:3 import-extcommunity
ip vpn-instance vrf3
route-distinguisher 100:3
import route-policy vrf3
vpn-target 2:2 3:3 export-extcommunityvpn-target 2:2 3:3 import-extcommunity ip vpn-instance vrf4 route-distinguisher 100:4 import route-policy vrf4 vpn-target 1:1 export-extcommunity vpn-target 2:2 import-extcommunity
#
route-policy vrf2 deny node 1
if-match extcommunity-filter 1
#
route-policy vrf2 permit node 2
#
route-policy vrf1 permit node 1
apply extcommunity rt 3:3 additive
#
route-policy vrf3 permit node 1
if-match extcommunity-filter 2
#
route-policy vrf4 permit node 1
if-match extcommunity-filter 3
#
ip extcommunity-filter 1 permit rt 2:2
ip extcommunity-filter 2 deny rt 1:1
ip extcommunity-filter 3 permit rt 3:3
#
If a route is imported to the routing table of VRF 1, which VRF can the route match?(A)

vrf2

vrf3

vrf4

None

NO.51 Refer to the exhibit.

As shown in the figure, CE 1 and CE 2 belong to VPN A, both LDP and
TE tunnels are configured between PE 1 and PE 2, the QPPB feature is configured on PE 2, and a tunnel policy is configured and applied to VPNs under PE 2 to make TE tunnels be preferred.
11.11.11.11/32 is a static route on CE 1 and is learned by CE 2. CE 2, however, fails to apply resource isolation VPN to PE 2. What is the possible cause?

The primary TE tunnel is down.

The MPLS TE LSP between PEs is established incorrectly.

MPLS TE is not enabled on PE 1.

Resource isolation VPN tunnels are established incorrectly

NO.52 Which of the following operations will make a PE send notifications to its peer in PWE3?

Shut down an AC interface

Delete the L2VPN services from an interface

Shut down a public network tunnel

Disable MPLS

NO.53 Whichstatementabout the configuration of route target (RT) and route distinguisher (RD) is true?

If routes need to exchange between two VPNs, the value of import RT of one VPN must be partially the
same as Export RT of the other VPN.

RD and RT of a VPN instance cannot be the same as those of another VPN instance on the same PE.

If routers need to exchanged two VPNs, the value of import RT of one of the same as that of RT of the
other VPN.

Two instances of a VPN share an RT.

NO.54 Which of the following statements about the VPLS packet forwarding are true?

If a PE receives broadcast packets from a local user, the PE forwards the packets to all other interfaces
In the same VSI and all other PEs.

If the destination MAC address of a packet is not a broadcast address and a PE has not learned the MAC
address, the broadcast this packet in one VSI

If the destination MAC address of a packets is not a broadcast address and a PE has not learned the
MAC address, the PE broadcast this packet in on VSI.

If a receive broadcast packet sent a remote PE, it forwards the packet only to the AC interface instead of
other PEs.

NO.55 In the inter-AS multicast, which statement about transmitting MSDP SA messages is false?

SA messages can be transmitted only between RPs in different PIM networks.

The router uses the SA cache to store SA messages.

The SA message contains the multicast source and group information

The router checks the RPF after receiving SA messages.

NO.56 With the SA, which of the following, option is correct?

KE SA is unidirectional

IKE SA is bidirectional

IPSec SA is unidirectional

IPSec SA is bidirectional

NO.57 [Quidway]multicast routing-enable
[Quidway]interface Ethernet10/1/0
[Quidway-Ethernet10/1/0]igmp enable
[Quidway-Ethernet10/1/0]igmp robust-count 4
[Quidway-Ethernet10/1/0]quit
[Quidway]igmp
[Quidway-igmp]timer query 100
[Quidway-igmp]robust-count 3
The default IGMP query interval is 60s and the default query response interval is 10s. If Ethernet 10/1/0 receives an IGMP Report message, how long is the timeout interval for creating a group record?

310s

250s

410s

130s

NO.58 Which statement about primary VPN tunnel binding is false?

Only the data destined for the specific peer device is transmitted through the n=bound primary VPN
tunnel Data to other devices is transmitted using the default tunnel policy.

Primary tunnel ensures that data can be transmitted from a VPN t a specific peer device permanently
through a dedicate TE tunnel.

Primary VPN tunnel binding means to bind a tunnel to a specific VPN. The bound tunnel is exclusive to
the VPN.

The bound primary tunnel can be selected sequentially.

NO.59 As shown in the figure, DUT stands for the device under test and RTA is used to support the test. Which combination of the following configurations is mandatory for fast convergence?
1. BFD
2. Minimum LSP refreshing interval
3. Most sensitive SPF timer
4. Minimum Hello packet sending interval
5. Minimum LSP sending interval
6. Longest computing time of SPF slices
7. Minimum LSP retransmission interval
8. Minimum LSP generation time
9. Flash-flood
10. GR function
11. Setting cost-style to wide

3, 5, 6

3, 5, 6, 8, 9C.1, 3, 5, 6, 9

1, 2, 3, 5, 7, 8, 9

NO.60 Which statement about the configuration of route target (RT) and route distinguisher (RD) is true?

If routes need to exchange between two VPNs, the value of import RT of one VPN must be partially the same as Export RT of the other VPN.

RD and RT of a VPN instance cannot be the same as those of another VPN instance on the same PE.

If routers need to exchanged two VPNs, the value of import RT of one of the same as that of RT of the other VPN.

Two instances of a VPN share an RT.

NO.61 Exhibit.

As shown in the figure, OSPF process 100 runs on both PEs and CEs, and VPN routers are transmitted
between PE 1 and PE 2 through PGB CE 1 enables interface address 43.1.1.0/24 in area 0.A route to
43.1.10/24. However, does not exist in the routing table of CE 2. What are the possiblecauses?

The VPN route to 43.1.1.0/24 does not exist in the routing table of PE 2.

The LSDB of PE 1 does not have the type 1 LSA generated by CE 1.

The LSDB of PE 12 does not have the type 1 LSA generated by CE 1.

The public network rout to 43.1.1.0/24 does not exist in the routing table of PE2
.

NO.62 As shown in the figure, PE 1 sets up an MP-IBGP neighbor relationship
with PE 2 and they communicate over MPLS LDP. A CE communicates with a PE over EBGP.Add two entries to the routing table of the VRF on PE 1:
VRF1 RD 100:1, IRT 1:1, ERT 2:2VRF2 RD 100:2, IRT 1:1, 2:2, ERT 2:2, 3:3 Add two entries to the routing table of the VRF on PE 2:
VRF1 RD 100:1, IRT 1:1, ERT 2:2
VRF2 RD 100:2, IRT 2:2, ERT 1:1
Import a valid static route 1.1.1.1/32 on CE 1. Suppose CE 2, CE 3, and CE 4 do not have route 1.1.1.1/32 in the local routing table. Which of the following routers have route 1.1.1.1/32 in the unicast routing table?