Huawei Certified Datacom Professional - Fast Certification – ENU v7.0

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Exam contains 629 questions

Which statements about QinQ are true?(Select 2 Answers)

  • A. QinQ saves VLANs on the public network.
  • B. To avoid VLAN conflict, the customer must negotiate with the service provider before modifying the VLANs on its private network.
  • C. When the service provider upgrades the network, the configurations on the user network do not need to be modified.
  • D. All of the above


Answer : AC

Some vendors set the TPID value in the outer VLAN tag of QinQ packets to the non- protocol value.
To be compatible with these vendors' devices, the TPID value on Huawei switches is adjustable.
Which is the default value of the TPID value on Huawei switches?

  • A. 0x9200
  • B. 0x9100
  • C. 0x8200
  • D. 0x8100


Answer : D

Which types of interfaces can be configured with selective QinQ?(Select 2 Answers)

  • A. Access interface
  • B. Trunk interface
  • C. Hybrid interface
  • D. dot1q-tunnel interface


Answer : BC

The STP protocol can prevent broadcast storms caused by loops on the Layer 2 network.

  • A. True
  • B. False


Answer : A

The STP protocol cannot prevent MAC address table flapping caused by loops on the
Layer 2 network.

  • A. True
  • B. False


Answer : B

Which are the port roles defined in STP?

  • A. Root Port
  • B. Designated Port
  • C. Alternate Port
  • D. All of the above


Answer : D

How many port states are defined by STP?

  • A. 3
  • B. 4
  • C. 5
  • D. 6


Answer : C

Each STP switch has a unique switch ID. Which two entries does the switch ID contain?

  • A. Two-byte switch priority
  • B. Six-byte MAC address
  • C. Two-byte switch priority and six-byte MAC address
  • D. Six-byte switch priority and six-byte MAC address


Answer : C

On an STP network, before the interface status transits from non-forwarding to forwarding, how many Forward Delay intervals does the interface wait for?

  • A. 2
  • B. 3
  • C. 4
  • D. 5


Answer : A

If loop exists and STP is not enabled, the switch will not operate normally.

  • A. True
  • B. False


Answer : A

Which of the following statements about STP Designated Port is true?

  • A. Each of the bridge can have one Designated Port only.
  • B. Designated Port is responsible for forwarding packets to its connected network segments.
  • C. The only path leading to the Root Bridge is through Designated Port.
  • D. Designated Port forwards the data packet from its corresponding switch to the Root Switch.


Answer : B

Which of the following statements about STP Designated Port is true?

  • A. Each of the bridge can have one Designated Port only.
  • B. Designated Port is responsible for forwarding packets to its connected network segments.
  • C. The only path leading to the Root Bridge is through Designated Port.
  • D. Designated Port forwards the data packet from its corresponding switch to the Root Switch.


Answer : B

Which of the following statements is not the advantage of STP?

  • A. STP can manage the redundant links. When the working link is down, network connectivity can be restored.
  • B. STP can prevent loops
  • C. STP can prevent broadcast storm
  • D. STP can save network bandwidth


Answer : D

Which of the following standards defines STP?

  • A. 802.1J
  • B. 802.1X
  • C. 802.1D
  • D. 802.1P


Answer : C

STP elects ( )

  • A. One bridge as the Root Bridge and another one as the Backup Root Bridge
  • B. One bridge as the Root Bridge
  • C. Two bridges as the Root Bridge
  • D. One Designated Bridge


Answer : B

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Exam contains 629 questions

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