Question 1

IGMP group entries play an important role in multicast forwarding. An administrator runs a command to view information about a multicast entry. The information is as follows: sql Copy

Interface group report information Vlanif100(10.1.6.2): Total 1 IGMP Group reported Group Address Last Reporter Uptime Expires 225.1.1.2 10.1.6.10 00:02:04 00:01:17 Given this, which of the following statements are true?

Options :

A : This entry can be used to construct the corresponding (S, G) entry.

B : This entry is created when the device receives an IGMP Join message from a user.

C : Expires indicates the aging time of the IGMP group.

D : 225.1.1.2 is the address of the group that the user joins.

Answer: B,C,D

Question 2

OSPF has five types of packets, which have the same header format. If the Auth Type field in the packet header is 1, which of the following authentication modes is used?

Options :

A : Non-authentication

B : MD5 authentication

C : Plaintext authentication

D : Hash authentication

Answer: C

Question 3

Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?

Options :

A : 802.11ac

B : 802.11n

C : 802.11ax

D : 802.11b

Answer: C

Question 4

The typical characteristics of the AI era are that it focuses on data, explores data value, and improves AI efficiency. Therefore, the core requirement of AI for data center networks is speed, meaning low latency.

Options :

A : TRUE

B : FALSE

Answer: A

Question 5

IP multicast effectively conserves network bandwidth and reduces network load. Therefore, it is widely used in network services, such as IPTV, real-time data transmission, and multimedia conferencing.

Options :

A : TRUE

B : FALSE

Answer: A

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