Expert Answers to Huawei Exam H12-821_V1.0 Questions

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HCIP-Datacom HCIP-Datacom-Core Technology V1.0

HCIP-Datacom-Core Technology V1.0

Last Update Dec 22, 2024
Total Questions : 174

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Questions 2

Without a prior version check, an engineer configures IGMP snooping on a device and the version of IGMP snooping is earlier than the IGMP versions on user hosts. In this case, which of the following situations will occur?

Options:

Users cannot receive multicast data because the device forwards received IGMP Report messages only to router ports and does not generate group member ports or forwarding entries.

Users cannot receive multicast data, but the device generates forwarding entries after receiving IGMP Report messages.

The IGMP snooping version of the device is automatically degraded, and users can receive multicast data properly.

The IGMP versions of the hosts are automatically upgraded, and users can receive multicast data properly.

Discussion 0

Questions 3

RSTP provides different functions in different scenarios. Which of the following statements Is false?

Options:

After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period

The role of the designated port that is enabled with root protection cannot be changed

If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation

When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state

Discussion 0

Questions 4

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

Options:

One multicast MAC address maps to 32 multicast IP addresses.

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

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.

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

Discussion 0

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Questions 5

Which of the following statements regarding the OSPF protocol is false?

Options:

Each OSPF router uses only one Router-LSA to describe the local active connection status of an area.

Routing information can be advertised only between backbone and non-backbone areas and cannot be advertised directly between non-backbone areas.

Router-LSA describes four connection types: P2P, TransNet, SubNet, and virtual link.

Link State ID in a Type 3 LSA indicates the router ID of an ABR.

Discussion 0

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