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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Core Technology V1.0 |
| Exam Number: | H12-821_V1.0 |
| Exam Price: | USD 300 |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Exam Format: | Multiple-choice questions, Single-choice questions, True/False, Drag and drop, Short answer |
| Available Languages: | English, Chinese, Japanese |
| Real Exam Qty: | 60-80 (varies) |
| Related Certifications: | HCIA-Datacom HCIP-Datacom-Advanced Routing & Switching HCIE-Datacom |
| Passing Score: | 600/1000 |
| Recommended Training: | Huawei Learning Portal - Datacom Track Huawei HCIP-Datacom Training Resources |
| Exam Registration: | Huawei Certification Official Portal Pearson VUE Huawei Exams |
| Sample Questions: | Huawei H12-821_V1.0 Sample Questions |
| Exam Way: | Computer-based exam (onsite test centers or online proctoring depending on region) |
| Pre Condition: | Recommended to hold HCIA-Datacom or equivalent networking knowledge |
| Official Syllabus URL: | https://certification.huawei.com/ |
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The HCIP-Datacom-Core Technology V1.0 exam is targeted at professionals who are involved in the design, implementation, and maintenance of data communication networks. H12-821_V1.0 Exam is designed to test the candidate's knowledge and proficiency in the core technologies used in data communication networks. HCIP-Datacom-Core Technology V1.0 certification is recognized globally and provides a competitive edge to professionals who are seeking to advance their careers in the field of data communication.
NEW QUESTION # 233
There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)
Answer:
Explanation:
asynchronous
Explanation:
In asynchronous mode, the local device sends BFD control packets at predefined intervals, and the remote device monitors the receipt of these packets to detect connectivity issues.
This is one of the two operating modes in BFD, the other being demand mode .
NEW QUESTION # 234
OSPF neighbors have multiple states, such as Down, Init, 2-way, Loading, or Full. In which of the following states do OSPF routers negotiate the master and slave roles?
Answer: C
Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:OSPF routers establish neighbor relationships and progress through various states during the adjacency formation process. The ExStart state is where routers negotiate the master and slave roles. This negotiation is critical because the master initiates the Data Description (DD) packet exchange process.
Here's a breakdown of the relevant OSPF states:
* ExStart State:
* This is the phase where the routers determine which one will act as the master and which will be the slave.
* The decision is based on the Router IDs of the two routers. The router with the higher Router ID becomes the master.
* Exchange State:
* After the master-slave roles are established, the routers exchange DD packets. These packets contain summaries of the LSAs in their respective LSDBs.
* 2-way State:
* This state indicates that bidirectional communication has been established between the two routers, but it occurs before master-slave negotiation.
* Init State:
* This is an early state where a router has sent a Hello packet to its neighbor but has not yet received a Hello packet in response.
Key Point:The negotiation of master and slave roles happens exclusively in the ExStart state, making D.
ExStart the correct answer.
References:
* Huawei HCIA-Datacom Study Guide, Chapter on "OSPF Neighbor States".
* RFC 2328 - OSPF Version 2 (Section 10.8).
NEW QUESTION # 235
In IPv6, NDP (Neighbor Discovery Protocol) uses multiple types of ICMPv6 packets. Which of the following functions are RS (Router Solicitation) packets used for?
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Neighbor Discovery Protocol (NDP) replaces ARP in IPv6 and uses ICMPv6 messages for:
* Router Solicitation (RS) # Sent by hosts to request Router Advertisement (RA) messages.
* Router Advertisement (RA) # Sent by routers to announce prefixes and network parameters.
* Neighbor Solicitation (NS) # Used for address resolution and Duplicate Address Detection (DAD).
* Neighbor Advertisement (NA) # Sent in response to NS messages.
* Redirect # Used by routers to redirect hosts to better gateways.
* RS is not directly used for address resolution; Neighbor Solicitation (NS) does this, so the answer should be D.
# Reference: Huawei HCIA-Datacom Study Guide, NDP and ICMPv6 Packet Types.
NEW QUESTION # 236
On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.
Answer:
Explanation:
Explanation of Root Port Election in STP:
In a Spanning Tree Protocol (STP) network, the Root Port is selected on each switch (except the Root Bridge). The Root Port is the port with the lowest path cost to the Root Bridge. If there is a tie in path cost, the following criteria are used in sequence to break the tie:
Steps for Root Port Election in Sequence:
* RPC Comparison (Root Path Cost):
* The port with the lowest Root Path Cost is preferred.
* Root Path Cost is the cumulative cost of the path to the Root Bridge.
* Peer BID (Bridge ID) Comparison:
* If the Root Path Costs are equal, the Bridge ID of the connected switch (peer) is compared.
* The port connecting to the switch with the lower Bridge ID is preferred.
* Peer PID (Port ID) Comparison:
* If the Bridge IDs are equal, the Port ID of the peer's sending port is compared.
* The port connecting to the lower Port ID is preferred.
* Local PID (Port ID) Comparison:
* If all else is equal, the Local Port ID of the switch is used.
* The port with the lower Local Port ID is selected.
NEW QUESTION # 237
In a network environment, there are both switches running RSTP and switches running SIP, then the phenomenon that will appear in this network is: (Multiple choice)
Answer: C,D
NEW QUESTION # 238
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