Amazon
Avaya
Cisco
CompTIA
CrowdStrike
EC-Council
EXIN
Fortinet
Google
ISC
ISC2
ITIL
Juniper
Microsoft
NVIDIA
Okta
Palo Alto Networks
Salesforce
All Vendors
  1. Home
  2. Huawei
  3. H12-821_V1.0

Huawei H12-821_V1.0 Exam (page: 8)
Huawei HCIP-Datacom-Core Technology V1.0
Updated on: 15-Feb-2026

Viewing Page 8 of 45
H12-821_V1.0 PDF 399 Questions

An edge port is a new port role added to RSTP to overcome the disadvantages of STP.
Which of the following statements is false about this port role?

  1. The port does not participate in RSTP calculation.
  2. The port can directly enter the Forwarding state from the Discarding state.
  3. After receiving a configuration BPDU, the port is still in the Forwarding state.
  4. The Up and Down states of the port do not cause network topology changes.

Answer(s): C

Explanation:

Edge Port Behavior

An edge port transitions directly to the Forwarding state but reverts to participating in RSTP calculations if it receives a valid configuration BPDU. Thus, statement C is false.

HCIP-Datacom-Core Reference

The behavior of edge ports and their transitions are discussed in the RSTP enhancement sections.



In an IPv4 address space, Class D addresses are used for multicast. Among Class D addresses, which of the following is the permanent group address range reserved for routing protocols?

  1. 232.0.0.0 to 232.255.255.255
  2. 239.0.0.0 to 239.255.255.255
  3. 224.0.0.0 to 224.0.0.255
  4. 224.0.1.0 to 231.255.255.255

Answer(s): C

Explanation:

Permanent Group Addresses for Routing Protocols

The range 224.0.0.0 to 224.0.0.255 is reserved for local network protocols, including routing protocols. Examples include OSPF (224.0.0.5/6) and RIP (224.0.0.9).

HCIP-Datacom-Core Reference

Reserved multicast address ranges are detailed in the multicast configuration sections.



Based on IGMP snooping, IGMP snooping proxy enables a switch to act as a substitute for an upstream Layer 3 device to send IGMP Query messages to downstream hosts, and also to act as a substitute for downstream hosts to send IGMP Report/Leave messages to an upstream device. As such, this function conserves bandwidth between the upstream device and the local device.

  1. TRUE
  2. FALSE

Answer(s): A

Explanation:

GMP Snooping Proxy

IGMP snooping proxy allows the switch to substitute for upstream Layer 3 devices and downstream hosts, reducing unnecessary bandwidth consumption by consolidating IGMP messages.

HCIP-Datacom-Core Reference

The IGMP snooping proxy functionality is described in multicast optimization and IGMP configuration chapters



In a PIM (Protocol Independent Multicast) network, which type of routing entries are used to set up multicast forwarding and are applicable to both PIM-DM and PIM-SM networks?

  1. (S, G)
  2. (P, G)
  3. (T, G)
  4. (S, P, T)

Answer(s): D

Explanation:

In Protocol Independent Multicast (PIM), there are two types of routing entries used for multicast forwarding:

(S, G) entries: Represent the Shortest Path Tree (SPT) from a specific source (S) to a specific multicast group (G). These entries are used in both PIM-Dense Mode (PIM-DM) and PIM-Sparse Mode (PIM-SM) to establish multicast forwarding paths.

(S, P, T) entries: Used in PIM networks to support the multicast routing mechanism and ensure efficient delivery of multicast packets.

In PIM-DM, multicast traffic is initially flooded and then pruned. (S, G) entries are created after the flooding stage.
In PIM-SM, multicast traffic flows through a shared tree first, but switches to (S, G) entries when the shortest path is established.

These concepts are covered in HCIP-Datacom-Core multicast and PIM configuration chapters.



DRAG DROP (Drag and Drop is not supported)

Match the following IPv4 multicast protocols with the corresponding functions.

  1. Refer to Explanation for the Answer

Answer(s): A

Explanation:

IGMP: Manages IPv4 multicast group members and runs on the multicast network's last segment (that is, the network segment where a Layer 3 network device is connected to user hosts).

PIM: Sends multicast data over the network to the multicast device that is connected to group members that have requested the multicast data, implementing multicast data forwarding based on routes.

IGMP Snooping: Manages and controls the forwarding of multicast data packets to effectively suppress the flooding of multicast data packets on the Layer 2 network.

IGMP (Internet Group Management Protocol):

IGMP is used by hosts and adjacent multicast routers to establish and maintain multicast group memberships on a local subnet.

It allows a host to inform a multicast router of its desire to receive multicast traffic for a specific group.

It operates at Layer 3 and runs on the last segment of the network.


Reference:

HCIP-Datacom-Core Technology Training Material (Multicast Fundamentals).

PIM (Protocol Independent Multicast):

PIM is a routing protocol designed for efficient routing of IP multicast traffic. It determines the paths over which multicast packets should be forwarded.

PIM is "protocol-independent" because it uses the underlying unicast routing table for RPF (Reverse Path Forwarding) checks.

It is responsible for distributing multicast data throughout the network.


HCIP-Datacom-Core Technology Training Material (Multicast Routing Protocols).

IGMP Snooping:

IGMP Snooping operates at Layer 2 and monitors IGMP traffic between hosts and routers.

It prevents multicast flooding by allowing a switch to forward multicast packets only to the ports that have joined specific multicast groups.

This significantly enhances efficiency in Layer 2 networks with multicast traffic.


HCIP-Datacom-Core Technology Training Material (IGMP Snooping Concepts).



Viewing Page 8 of 45



Share your comments for Huawei H12-821_V1.0 exam with other users:

Jorn 7/13/2023 5:05:00 AM

relevant questions
UNITED KINGDOM


AM 6/20/2023 7:54:00 PM

please post
UNITED STATES


Nagendra Pedipina 7/13/2023 2:22:00 AM

q:42 there has to be a image in the question to choose what does it mean from the options
INDIA


BrainDumpee 11/18/2023 1:36:00 PM

looking for cphq dumps, where can i find these for free? please and thank you.
UNITED STATES


sheik 10/14/2023 11:37:00 AM

@aarun , thanks for the information. it would be great help if you share your email
Anonymous


Random user 12/11/2023 1:34:00 AM

1z0-1078-23 need this dumps
Anonymous


labuschanka 11/16/2023 6:06:00 PM

i gave the microsoft azure az-500 tests and prepared from this site as it has latest mock tests available which helped me evaluate my performance and score 919/1000
Anonymous


Marianne 10/22/2023 11:57:00 PM

i cannot see the button to go to the questions
Anonymous


sushant 6/28/2023 4:52:00 AM

good questions
EUROPEAN UNION


A\MAM 6/27/2023 5:17:00 PM

q-6 ans-b correct. https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-cli-quick-start/use-the-cli/commit-configuration-changes
UNITED STATES


unanimous 12/15/2023 6:38:00 AM

very nice very nice
Anonymous


akminocha 9/28/2023 10:36:00 AM

please help us with 1z0-1107-2 dumps
INDIA


Jefi 9/4/2023 8:15:00 AM

please upload the practice questions
Anonymous


Thembelani 5/30/2023 2:45:00 AM

need this dumps
Anonymous


Abduraimov 4/19/2023 12:43:00 AM

preparing for this exam is overwhelming. you cannot pass without the help of these exam dumps.
UNITED KINGDOM


Puneeth 10/5/2023 2:06:00 AM

new to this site but i feel it is good
EUROPEAN UNION


Ashok Kumar 1/2/2024 6:53:00 AM

the correct answer to q8 is b. explanation since the mule app has a dependency, it is necessary to include project modules and dependencies to make sure the app will run successfully on the runtime on any other machine. source code of the component that the mule app is dependent of does not need to be included in the exported jar file, because the source code is not being used while executing an app. compiled code is being used instead.
Anonymous


Merry 7/30/2023 6:57:00 AM

good questions
Anonymous


VoiceofMidnight 12/17/2023 4:07:00 PM

Delayed the exam until December 29th.
UNITED STATES


Umar Ali 8/29/2023 2:59:00 PM

A and D are True
Anonymous


vel 8/28/2023 9:17:09 AM

good one with explanation
Anonymous


Gurdeep 1/18/2024 4:00:15 PM

This is one of the most useful study guides I have ever used.
CANADA