Huawei h12-221 practice test

HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network)

Last exam update: Nov 27 ,2025
Page 1 out of 15. Viewing questions 1-15 out of 225

Question 1

Enabling MD5 authentication between BGP peers can prevent DoS attacks that target BGP peers.

  • A. TRUE
  • B. FALSE
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Answer:

A

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Question 2

Which of the following statements are correct regarding OSPF intra-area route calculation? (Select 2
answers)

  • A. Each OSPF router uses only one Router LSA to describe the local active link state for an area.
  • B. Each OSPF router uses more than one Router LSA to describe local active link state for an area.
  • C. One Router LSA describes only one link,
  • D. One Router LSA describes more than one link.
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Answer:

A,D

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Question 3

Which of the following is the address range assigned by IANA for SSM service in IPv4?

  • A. 232.0.0.0/24
  • B. 225.0.0.0/8
  • C. 232.0.0.0/8
  • D. 239.0.0.0/8
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Answer:

D

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Question 4

Which of the following are multicast routing protocols? (Select 3 answers)

  • A. DVMRP
  • B. PIM-DM
  • C. OSPF
  • D. PIM-SM
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Answer:

A,B,D

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Question 5

Which of the following route entries match the IP-Prefix defined below? ip ip-prefix test index 10
permit 192.168.0.0 16 greater-equal 24 less-equal 28 (Select 2 answers)

  • A. 192.168.1.0/24
  • B. 192.10.2.0/24
  • C. 192.168.3.0/25
  • D. 192.168.4.0/30
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Answer:

A,C

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Question 6

Which of the following is the multicast distribution tree maintained by PIM-DM?

  • A. SFT
  • B. CBT
  • C. RFT
  • D. STP
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Answer:

A

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Question 7

Which of the following attributes must exist in the BGP update messages? (Select 3 answers)

  • A. LOCAL_PREF
  • B. NEXT_HOP
  • C. ORIGIN
  • D. AS_PATH
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Answer:

B,C,D

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Question 8

In OSPF protocol, Different types of networks cannot establish an adjacency with each other in the
Full state.

  • A. TRUE
  • B. FALSE
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Answer:

B

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Question 9

What does an IP address of 0.0.0.0 indicate?

  • A. Network address
  • B. Broadcast address of specially designated network segment
  • C. All networks
  • D. Broadcast address of all nodes of local network segment
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Answer:

C

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Question 10

The unicast and multicast technologies are both outstanding in solving the problem of "single source,
multiple destinations" in order to allow efficient P2MP data transmission.

  • A. TRUE
  • B. FALSE
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Answer:

B

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Question 11

Which of the following connection types can a Router LSA describe? (Select 3 answers)

  • A. Point-to-point
  • B. Star
  • C. Transit
  • D. Virtual link
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Answer:

A,C,D

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Question 12

BGP peers are automatically discovered by exchanging multicast packets.

  • A. TRUE
  • B. FALSE
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Answer:

B

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Question 13

Which of the following describes the relationship between BGP and AS?

  • A. BGP only runs between ASs, and cannot run within an AS.
  • B. BGP is an EGP used by ASs to exchange routing information with other ASs.
  • C. BGP builds network topologies by exchanging link-state information between ASs.
  • D. BGP cannot run between ASs.
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Answer:

B

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Question 14

If the subnet mask for Class A address is 255.255.240.0, how many bits are used for subnetting?

  • A. 4
  • B. 5
  • C. 9
  • D. 12
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Answer:

D

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Question 15

When running in non-broadcast networks, OSPF uses one of the two modes: NBMA or P2MP.

  • A. TRUE
  • B. FALSE
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A

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