Question 1

On Huawei switches, which of the following planes provides network information and forwarding entries that are mandatory for data plane forwarding?

Options :

A : Forwarding plane

B : Control plane

C : Data plane

D : Monitoring plane

Answer: B

Question 2

On an OSPF network, an algorithm is used to prevent loops within an area, but loops may occur between areas. Therefore, OSPF defines a loop prevention mechanism for inter-area routes. Which of the following statements are true about the loop prevention mechanism?

Options :

A : Inter-area routes cannot be directly transmitted between non-backbone areas.

B : All non-backbone areas must be directly connected to area 0.

C : Inter-area routes need to be forwarded through area 0.

D :

An ABR cannot inject Type 3 LSAs that describe routes to a network segment in an area back to thesame area.

Answer: A,B,C,D

Question 3

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 4

In BGP, the Origin attribute is used to identify the origin of a route. Which of the following statements are true about the Origin attribute?

Options :

A :

If a route is imported to BGP by the originator using the network command, the Origin attribute of the BGP route is displayed as i in the BGP routing table.

B :

If a route is learned through EGP, the Origin attribute of this BGP route is displayed as ? in the BGP routing table.

C :

If multiple routes carry the same destination address but different Origin attributes and all other route selection conditions are the same, BGP selects the optimal route according to the Origin attribute in the following order: IGP > EGP > Incomplete.

D : This attribute is a well-known mandatory attribute.

Answer: A,C,D

Question 5

Which of the following attacks is not the network layer attack?

Options :

A : IP spoofing attack

B : ICMP attack

C : Smurf attack

D : ARP spoofing attack

Answer: D

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