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Huawei H12-821_V1.0-ENU Exam Syllabus Topics:

Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions:

1. After dividing an interface of the firewall into the Untrust security zone, the interface belongs to the Untrust zone and no longer belongs to the Local zone.

A) FALSE
B) TRUE

2. Which descriptions about IGMP Snooping are correct? (Multiple choice)

A) IGMP Snooping does not consume the CPU of the switch
B) IGMP Snooping solves the problem of broadcasting multicast packets at Layer 3.
C) IGMP Snooping runs at the link layer and is a multicast restriction mechanism on Layer 2 Ethernet switches, used to manage and control multicast groups
D) IGMP Snooping establishes a MAC multicast address table by listening to the IGMP text sent by the host

3. If a new member joins a multicast group in PIM-DM, which of the following descriptions are correct?
(Multiple choice)

A) In existing networks, the method of waiting for the multicast routing table to time out and then flooding the entire network again is often used to help new users receive multicast information.
B) The multicast network needs to update the multicast distribution tree before it can send multicast data to group members.
C) In PIM-DM mode, after using the "diffusion-pruning" method to establish a multicast distribution tree, the status refresh mechanism prevents the downlink interface from automatically recovering once it is suppressed.
D) You can use the grafting mechanism to proactively establish a multicast distribution path in reverse direction to help new users receive multicast information.

4. Which of the following descriptions about IGMPv3 are correct? (Multiple choice)

A) IGMPv3 defines a special member leaving message, which can quickly confirm whether the member of the corresponding multicast group has left
B) In IGIPv3, a member report message can carry multiple multicast group information
C) IGMPv3 provides the ability to carry multicast source information in the message, helping the host to select the multicast source
D) The query packets in IGMPv3 not only include general group query packets and specific group query packets, but also add specific source group query packets

5. L2TP is a type of VPDN (Virtual Private Dial-up network) tunnel protocol. It is a VPN that provides access services for traveling employees or corporate branches to remotely access corporate intranet resources in remote office scenarios. It runs on the network layer of the TCP/IP protocol stack.

A) FALSE
B) TRUE

Solutions: