Question 1

The IP prefix list configuration on a Huawei router is shown below. Which of the following routes can match this IP prefix list?

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[huawei] ip ip-prefix test index 10 permit 10.0.0.0 8 less-equal 32

Options :

A : 10.1.1.1/32

B : 10.1.1.0/6

C : 10.1.1.0/24

D : 10.0.0.0/16

Answer: A,C,D

Question 2

Which of the following statements is false?

Options :

A :

If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.

B : A device with a higher router priority has a higher election priority.

C :

When a router with the highest router priority joins an OSPF network, this router will become the new DR.

D :

If two devices have the same router priority, the device with a larger router ID has a higher election priority.

Answer: C

Question 3

As shown in the figure, data traffic is forwarded in tunnel mode along the path of STA -> HAP -> HAC -> upper-layer network before roaming. What is the flow direction of data traffic after Layer 3 roaming?

Options :

A : STA -> FAP -> FAC -> HAC -> HAP -> HAC -> Upper-layer network

B : STA -> FAP -> FAC -> HAC -> Upper-layer network

C : STA -> FAP -> FAC -> Upper-layer network

D : STA -> FAP -> FAC -> HAC -> HAP -> Upper-layer network

Answer: B

Question 4

Which of the following statements regarding multicast MAC addresses are false?

Options :

A : One multicast MAC address maps to 32 multicast IP addresses.

B : One multicast MAC address maps to only one multicast IP address.

C :

The high 24 bits of the multicast MAC address are 0x01005E, the 25th bit is fixed to 1, and the lower 23 bits of the MAC address map to the lower 23 bits of the multicast IP address.

D : A multicast MAC address identifies receivers of a multicast group on the data link layer.

Answer: B

Question 5

An enterprise network runs OSPF to implement network communication. Which of the following types of LSAs may be generated by an ABR?

Options :

A : NSSA LSA

B : AS External LSA

C : Network Summary LSA

D : ASBR Summary LSA

Answer: A,C,D

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