Huawei H31-161 실제 시험문제 및 답변

문제1
Which of the following statements about the Martini VPLS are true?

A. Labels are retained using the liberal label retention method.

B. A VC must be established using remote LDP.

C. When LDP is used to transmit signaling, LDP TLVs carry the VPLS information.

D. Labels are allocated for PWs in DU mode when they are established.

E. Labels are allocated for PWs in DoD mode when they are established.

정답: A,D

문제2
Which statement describes the packet loss ratio requirement of the voice service for the IP bearer network?

A. Allowed maximum packet loss =1%

B. No strict requirement

C. Allowed maximum packet loss =10-6

D. Allowed maximum packet loss =1%

정답: A

문제3

A. At least three EXP values may be contained, and the values are uncertain.

B. Only two EXP values may be contained, and the values are uncertain.

C. The EXP values must be 0, 1, and 4.

D. Which statement about EXP values corresponding to these three services is true?

E. Only one EXP value may be contained, and the value is uncertain.

정답: A

문제4
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?

A. Handshake protocol

B. Record protocol

C. Alarm protocol

D. Tunnel protocol

정답: A,B,C

문제5
Which of the following statements about TE FRR in forwarding adjacency (FA) mode and TE FRR in IGP Shortcut mode are true?

A. 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.

B. 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 changes and therefore it triggers an FRR.

C. 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.

D. 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.

정답: A,D

문제6
Which of the following statements about the L2VPN are true?

A. When a traditional L2VPN (ATM and FR) is upgraded to an MPLS L2VPN, the network topology does not need to be adjusted.

B. On a L2VPN, routing information of users does not need to be maintained or managed.

C. 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.

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.

정답: A,B

문제7
Refer to the exhibit.

OSPF process 1 is started on RTA and assigned to the vpn1 instance.
After the vpn-instance-capability simple command is configured in the OSPF view, which of the following statements are false?

A. When RTA imports a BGP route from OSPF process 1, an extended community identification must be carried to specify the OSPF attributes of the route.

B. Bit B is not set in the router LSA generated by RTA in area 1.

C. After RTA imports a BGP route from the MPLS VPN backbone network, if Domain ID of the BGP route is the same as that used in the local OSPF area and the BGP route is an intra-area route, a Type 3 summary LSA is generated and flooded to area 1.

D. When RTA receives a Type 3 summary LSA with the DN bit in area 1, it ignores the calculation of the LSA.

정답: A,C,D

문제8
As shown in the figure, RTA, RTB, RTC are interconnected over IS-IS, RTA, RTD, RTE, and RTC are interconnected over OSPF. Both IS-IS and OSPF use the default costs. RSVPTE is enabled on all routers and the interfaces between these routers. The Loopback0 interface of RTC is 192.168.0.3/32 and is advertised in both OSPF and ISIS areas. 192.168.0.3/32 is also the LSR ID of MPLS. Configurations of the MPLS and tunnel on RTA:
#
mpls lsr-id 192.168.0.1
mpls
mpls te
mpls rsvp-te
mpls te cspf
interface Tunnel1/0/0
tunnel-protocol mpls te
destination 192.168.0.3
mpls te tunnel-id 1
mpls te path metric-type igp
mpls te igp metric absolute 1
mpls te commit
#
Which path will be selected when the tunnel becomes Up? What is the metric of this tunnel?

A. RTA-RTD-RTE-RTC; 3

B. RTA-RTB-RTC; 20

C. RTA-RTD-RTE-RTC; 1

D. RTA-RTB-RTC; 1

정답: C

문제9
The inner VLAN tag in layer 2 user packets is used to differentiated key services from other services. If packets are not processed after being encapsulated by QinQ, the 802. 1p information of the inner VLAN tag becomes invalid. After the QinQ is employed, three methods can be used to configure conditions for sensing 8021p configuration of the inner VLAN tag:
1. Reset the 802.1p of the outer VLAN tag regardless of the existing 02 1p configurations of the inner VLAN tag.
2. Automatically swap the 802. 1p configurations of the inner VLAN tag to that of the outer VLAN tag.
3. Reset the 802.1p configurations of the outer VLAN tag based on the existing 802.1p configurations of the different VLAN tags

A. True

B. False

정답: A

문제10
On a BGP/MPLS VPN, a PE and a CE communicate with each other over OSPF. Which command cannot be configured on the PE?

A. route-tag 3

B. sham-hello

C. vpn-instance-capability simple

D. domain-id 3

정답: C

문제11
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?

A. Import BGP routes in IS-IS process 100

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

C. Import BGP routes in IS-IS process 200

D. Import IS-IS 100 routes in IS-IS process 100

정답: A

문제12
<Quidway>display current-configuration
#
multicast routing-enable
#
interface Ethernet6/1/0
ip address 10.1.1.1 255.255.255.0
igmp timer query 40
#
igmp
The preceding are partial multicast router configurations. How long is the interval (in seconds) for sending IGMP General Query messages when IGMP is enabled on Ethernet 6/1/0?

A. 60

B. 15

C. 40

D. 10

정답: D

문제13
Which of the following statements about the fault notification in VLL FRR are true?

A. The primary PW is carried over an LDP LSP tunnel on the public network side and BFD for LDPLSP (detection interval: 30 ms) is enabled on the LDP LSP tunnel. If a forwarding fault occurs on the public network side of an LSP tunnel, BFD fast detects the fault and sends a notification to the L2VPN for PW switching.

B. A forwarding fault occurs on the public network side of the primary PW. If BFD for PW (detection interval: 300 ms) is enabled on the primary PW, BFD fast detects the fault and sends a notification to the L2VPN for PW switching.

C. A forwarding fault occurs on the public network side of the primary PW. If BFD for PW is not enabled on the primary PW, the L2VPN cannot perceive the fault on the PSN side and therefore PW switching is not triggered.

D. The primary PW is carried over a GRE tunnel on the public network side and BFD for PW (detection interval: 30 ms) is enabled on the GRE tunnel. If a forwarding fault occurs on the PSN side of the primary PW, BFD cannot detect the fault because the PW is carried over a GRE tunnel. In this case, the L2VPN needs to detect the fault itself and triggers PW switching.

정답: A,B

문제14
An Ethernet cable connects RTA to RTB through Ethernet 0/0.the OSPF neighbor relationship can be established without enabling the OSPF authentication function is enabled, Which of the following statements about the OSPF relationship between RTA and RTB are true?

A. MD5 authentication is used between RTA and RTB

B. Simple authentication is used between RTA and RTB

C. The OSPF neighbor relationship cannot be established between RTA and RTB due to failure of area authentication

D. The OSPF neighbor relationship can be established between RTA and RTB

정답: A,D

문제15
As shown I the figure, the asymmetric VLL FRR networking is used AC interfaces on PE 1, PE 2 and PE 3 are configured as follows:

Which of the following statements are the true on the condition that IGP and MPLS are configured correctly on the public network?

A. The PW between PE1 and PE 2 is the primary PW.

B. If a forwarding fault is detected on the public network side of the between PE 1 and PE 2, traffic from CE 2 to CE 1 can be switched to the PW between PE 1 and PE3.

C. If a forwarding fault is detected on the PW between PE a and PE 2 , traffic from CE 1 to CE 2 can be switched to the PW between PE 1 and PE 3.

D. If a forwarding fault is detected on the PW between PE a and PE 2 , traffic can be switched to the backup PW on PE 1.

정답: C

최신Huawei HCIE-Carrier IP (Written) - H31-161무료샘플문제

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