Huawei h12-261 practice test

HCIE-Routing & Switching (Written) V3.0 Exam

Last exam update: Nov 27 ,2024
Page 1 out of 32. Viewing questions 1-15 out of 479

Question 1

If a multicast group has multiple receivers and the administrator enables the IGMP snooping function
on the switch connected to the receivers, how do the receivers respond after receiving General
Query messages from the querier?

  • A. Only the receiver whose response timer expires firstly sends a Report message
  • B. All receivers send Report messages
  • C. All receivers send Report messages only when IGMPv1 is run
  • D. All receivers send Report messages only when IGMPv2 is run
Answer:

A

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Question 2

Typically, users within a VPN only communicate with other users in the same VPN. They cannot
communicate with users on the Internet or access the Internet. Many VPN sites, however, may need
to access the Internet. Which of the following statements regarding interconnection between the
VPN and the Internet are true?

  • A. The interconnection between the VPN and the Internet can be implemented on the PE. However, the implementation is complex and may bring security risks. The PE is vulnerable to DoS attacks from the Internet.
  • B. Directly connect the CE to the Internet on the user side. Each user site can independently access the Internet. That is, a default route destined for the Internet is configured on the CE of each site.
  • C. Configure the PE to send a default route destined for the Internet to the CE, and add a default route destined for the Internet gateway to the VPN instance routing table.
  • D. Isolating public network routes and VPN routes on the user side is simple, secure, and reliable.
Answer:

A,C,D

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Question 3

Which of the following technologies can be used to improve the MPLS BGP VPN reliability?

  • A. VPN GR
  • B. FRR for private IP routes between Pes and CEs
  • C. VPN FRR
  • D. CE dual-homing networking at the access layer
Answer:

A,C,D

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Question 4

Which of the following AS-paths can be matched by the AS-Path filter configured using the ip as-
path-filter 1 permit ^12.*74$ command?

  • A. AS_Path (32 1274 23)
  • B. AS_Path (125 328 74 23)
  • C. AS_Path (123 621 743 2374)
  • D. AS_Path (321 12 2374)
Answer:

C

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Question 5

To reduce the amount of OSPF data and routing information in some areas, OSPF has special area
types. Which of the following statements regarding OSPF special areas is true?

  • A. The ASBR-summary-LSA can be advertised to an NSSA
  • B. The AS-external-LSA can be advertised to a stub area
  • C. Any OSPF area can be configured as a special area
  • D. A router in a special area cannot establish an OSPF neighbor relationship with a router in a common area
Answer:

C

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Question 6

In the aggregate ipv4-address {mask | mask-length} [as-set | attribute-policy route-policy-name1 |
detail-suppressed | origin-policy route-policy-name2 | suppress-policy route-policy-name3]
command, multiple parameters can be used to affect the BGP summarized route and summarization
result. Which of the following statements regarding this command are true?

  • A. If the origin-policy parameter is specified, only the specific routes matching route-policy are summarized.
  • B. If the attribute-policy parameter is specified, attributes of the summary route can be modified.
  • C. If the suppress-policy parameter is specified, a summary route is generated. The if-match clause of the route-policy can be used to filter specific routes to be suppressed. The specific routes matching route-policy are still advertised to other BGP peers.
  • D. If the as-set parameter is specified, the AS_Path attribute of the summary route contains AS path information about all specific routes to prevent loops.
Answer:

A,B,D

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Question 7

As shown in the following figure, R1 can connect to the Internet through R2 or R3. EBGP connections
are set up between R1 and R2 and between R1 and R3. R2 and R3 reside in the same AS and
advertise default routes using BGP. Which of the following methods can be used to enable traffic
from R1 to the Internet to be preferentially forwarded by R2?

  • A. On R2, set the Local_Pref value to 150 in the egress direction of R1
  • B. On R1, set the MED attribute value to 150 in the ingress direction of R3
  • C. On R1, set the Local_Pref attribute value to 150 in the ingress direction of R2
  • D. On R2, set the MED attribute value to 150 in the egress direction of R1
Answer:

C

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Question 8

A Huawei router is configured to import a route into OSPF on an enterprise network. Which of the
following statements about the LSA generated from the imported route are true?

  • A. The Net Mask field is set to all 0s
  • B. The Link State ID, and Advertising Router fields can uniquely identify an LSA
  • C. The Advertising Router field is set to the ASBR’s Router ID
  • D. The Link State ID field is set to the destination network segment address
Answer:

B

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Question 9

Which of the following statements regarding an OSPF virtual link is true?

  • A. A virtual link can be used to solve the problem of a non-continuous Area 0
  • B. A virtual link uses the IP address of the outbound interface as the link address
  • C. A virtual link can be established in any area, and the virtual link belongs to the area after it is established
  • D. A virtual link with a cost of 0 is the optimal link
Answer:

A

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Question 10

Regular expressions can be used in Community-filter and AS-Path-filter to filter routes.

  • A. TRUE
  • B. FALSE
Answer:

A

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Question 11

Which of the following statements regarding OSPFv3 LSAs are true?

  • A. The Link State ID of an Inter-Area-Prefix-LSA contains prefix information
  • B. Router-LSAs and Network-LSAs do not contain routing information
  • C. Inter-Area-Prefix-LSAs contain link-local information
  • D. When the Referenced Link State Type of an Intra-Area-Prefix-LSA is 2, the Referenced Link State ID contains the interface ID of the DR
Answer:

D

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Question 12

Which of the following statements regarding MP-BGP is false?

  • A. The MP_UNREACH_NLRI attribute of Update packets does not contain path information
  • B. MP_REACH_NLRI and MP_UNREACH_NLRI are optional transitive attributes
  • C. The complete MP_REACH_NLRI attribute structure contains the address family, next hop, and prefix information
  • D. MP-BGP can be used to allocate labels
Answer:

B

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Question 13

Which of the following statements regarding deploying IS-IS in an IPv6 environment is true?

  • A. On a broadcast network, the IPv4 DIS priority and IPv6 DIS priority can be set, respectively.
  • B. If the isis silent command is run on an IS-IS interface, the interface does not send but receives IS-IS packets.
  • C. On a broadcast network, if each router supports both IPv4 and IPv6, the IPv4 DIS and IPv6 DIS must be the same device.
  • D. By default, the DIS priority of Level-1 and Level-2 broadcast interfaces is 1.
Answer:

A

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Question 14

Assuming three routers (A, B, and C) uses BGP as the routing protocol. A sends Update packets to B
and B sends the Update packets to C. Which of the following attributes meet the following two
conditions?
(1) A can select whether to carry this attribute in Update packets.
(2) If B receives an Update packet carrying this attribute, B still advertises the Update packet to C
although B cannot identify this attribute. Then, Router C may identify and use this attribute.

  • A. Multi_Exit_Disc
  • B. Local_Pref
  • C. Community
  • D. Aggregator
Answer:

C,D

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Question 15

Which of the following statements regarding OSPFv3 Link-LSAs is true?

  • A. The Link-LSA contains both the link-local address and all IPv6 prefixes of the interface
  • B. The Link-LSA contains both the link-local address of the interface and all IPv6 prefixes of the same area on the router
  • C. The Option field exists in an LSA header rather than the data area of a Link-LSA
  • D. If the PrefixOptions field of a prefix in the Link-LSA is 0x00, the prefix is not involved in the IPv6 unicast calculation
Answer:

B

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