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Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) exam is a challenging certification test that requires a thorough understanding of advanced data communication concepts. H12-821_V1.0 exam covers a broad range of topics that include network design and planning, network security, and troubleshooting. Passing H12-821_V1.0 exam demonstrates that a candidate has a solid grasp of the core technologies used in data communication networks and is capable of designing, implementing, and maintaining complex network solutions.
Huawei H12-821_V1.0 Exam covers a wide range of topics, including datacom basics, network architecture, transmission technology, IP technology, and routing technology. H12-821_V1.0 exam is designed to test the candidate's skills in configuring network devices, troubleshooting network problems, and optimizing network performance. HCIP-Datacom-Core Technology V1.0 certification exam is conducted online and consists of multiple-choice questions, simulation questions, and case studies.
Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) Certification Exam is a certification designed for professionals who want to demonstrate their knowledge and skills in data communication core technology. HCIP-Datacom-Core Technology V1.0 certification is provided by Huawei, a leading global provider of information and communication technology (ICT) infrastructure and smart devices.
NEW QUESTION # 16
A firewall receives a packet that PC1 sends to PC2. Which of the following statements are true?
- A. The packet matches security policy rule 1, and the firewall discards the packet.
- B. No source or destination security zone is specified in security policy rule 2, indicating that any security zone is a match.
- C. The packet matches security policy rule 1, and the firewall forwards the packet.
- D. The packet does not match any security policy.
Answer: C
Explanation:
The security policy specifies that traffic originating from12.1.1.2and destined for the untrust zone is permitted. Since the source address of the packet (12.1.1.1) does not match this rule, thepacket matches the default implicit deny rule. However, rule 1 does not deny all other traffic explicitly, so the packet is forwarded based on further configurations .
NEW QUESTION # 17
As shown in the figure, it is a multicast network.
Which of the following ports are multicast group member ports? (Multiple choice)
- A. IF1
- B. IF4
- C. IF2
- D. IF3
Answer: A,B
NEW QUESTION # 18
See the following figure. RTA, RTB, RTC, and RTD are in the same AS and establish IBGP peer relationships through direct links. RTB an RTC are route reflectors (RRs), RTA and RTC are the RR clients of RTB, and RTB and RTD are the RR clients of RTC. If RTA advertises the route 10.1.1.0/24 to the BGP process, the Originator ID of the BGP route received by RTD is------------------.
Answer:
Explanation:
IN ORDER
NEW QUESTION # 19
The core router in the Diff-Serv domain usually only needs to perform simple traffic classification.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 20
In the active-standby negotiation of dual-link dual-device hot standby, the AP collects and compares the parameters carried in the ( ) message responded by the active and standby ACs to select the active AC.
Answer:
Explanation:
Discovery Response
NEW QUESTION # 21
On an OSPF network, if the network type is NBMA, a router unicasts all protocol packets; if the network type is broadcast, a router multicasts all protocol packets.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* OSPF network types affect how protocol packets (Hello, LSA updates) are transmitted:
* NBMA (Non-Broadcast Multi-Access) networks (e.g., Frame Relay) do not support multicast, so routers must unicast OSPF packets to neighbors.
* Broadcast networks (e.g., Ethernet) support multicast and use 224.0.0.5 for Hello packets and
224.0.0.6 for DR/BDR communication.
* The statement is false because:
* NBMA does not unicast all packets-only Hello packets must be manually configured to be unicast.
* LSAs and routing updates can still be multicast if an NBMA network is configured as point- to-multipoint.
# Reference: Huawei HCIA-Datacom Study Guide, OSPF Network Types and Packet Transmission.
NEW QUESTION # 22
Which of the following descriptions about the limitations of traditional traffic statistics is incorrect?
- A. Statistics cannot be collected on flows other than ACL rules.
- B. Based on IP packet counting, the statistical information is simple and cannot be counted on a variety of information.
- C. It requires consuming device interfaces. For ports that cannot be mirrored, supporting equipment needs to be purchased for access, which is costly.
- D. To conduct traffic statistics through the SNIP protocol, you need to continuously query the network management through polling, which wastes CPU and network resources.
Answer: A
NEW QUESTION # 23
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?
- A. AC1
- B. Random access
- C. None
- D. AC2
Answer: C
NEW QUESTION # 24
Which of the following working mechanisms are included in PIM-DM? (Multiple choice)
- A. Diffusion
- B. Pruning
- C. Status refresh
- D. Grafting
Answer: A,B,C,D
NEW QUESTION # 25
When a BGP device sends an Open message to establish a peer connection, which of the following information is carried?
- A. NLRI
- B. Local AS number
- C. Hold time
- D. Router ID
Answer: B,C,D
Explanation:
BGP Open Message Components
The Open message contains the following critical parameters:
Local AS Number: The autonomous system of the router.
Router ID: A unique identifier for the router.
Hold Time: The maximum time the router will wait for Keepalive or other messages from its peer.
NEW QUESTION # 26
The RSTP protocol provides a variety of protection functions. For example, when the edge terminal port is configured in the protection state, the processing method of the edge port after receiving the BPDU message is:
- A. Forward BPDU messages as required
- B. Obtain relevant information after the BPDU message
- C. Directly discard the BPDU message
- D. Close the port
Answer: D
NEW QUESTION # 27
As shown in the figure, SWA, SWB, and SWC run the Rapid Spanning Tree Protocol (RSTP). What are the roles of SWB's GE0/0/2 and SWC's GE0/0/1?
- A. Backup port, alternative port
- B. Alternative port, backup port
- C. Root port, designated port
- D. Backup port, root port
Answer: C
Explanation:
In the topology, SWB's GE0/0/2 is the Root Port because it has the least cost path to the Root Bridge (SWA).
SWC's GE0/0/1 is the Designated Port because it forwards traffic to SWA while maintaining the shortest path to the Root Bridge. This setup ensures efficient traffic flow in the spanning tree topology .
NEW QUESTION # 28
How does an IGMPv2 router maintain network segment group membership? (Multiple choice)
- A. After receiving the eave message, the router immediately deletes the group membership
- B. The router will query for a specific group
- C. The router maintains a timeout timer for each group membership. If the receiver host is received, the timer is refreshed. If the timer expires, the group membership is deleted.
- D. The router periodically sends a Query message, and the receiver host reports a Report message after receiving the Query message
Answer: B,C,D
NEW QUESTION # 29
Roaming technology is typically used on a large WLAN to ensure that STA (station) services are not interrupted when STAs move between coverage areas of different APs.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Wireless LAN (WLAN) roaming allows mobile devices (STAs) to move seamlessly between different APs without dropping connections.
* Types of WLAN Roaming:
* Layer 2 roaming # STAs move between APs in the same subnet without IP address changes.
* Layer 3 roaming # STAs move across different subnets, requiring IP address reconfiguration (handled via DHCP or tunneling).
* Since roaming prevents service interruption in large WLAN deployments, the statement is true.
# Reference: Huawei HCIA-Datacom Study Guide, WLAN Roaming and Seamless Connectivity.
NEW QUESTION # 30
The three routers run IS-IS and have established an adjacency relationship. The area numbers and router levels are marked in the figure.
If the road between R1 and R2 is interrupted, which of the following statements is correct? (Multiple choice)
- A. The default route in the R2 routing table still exists
- B. R1 runs the SPF algorithm to remove R2 from the SPF trunk
- C. The default route in the R2 routing table will disappear
- D. R1 sets the Age of the LSP generated by R2 to 0
Answer: B,C
NEW QUESTION # 31
When configuring an ACL on a router, you can specify a unique number or name to identify the ACL. Once a named ACL is created, it cannot be modified. You can only delete the named ACL and reconfigure it.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
ACL Modification
Named ACLs can be modified after their creation. Unlike numbered ACLs, named ACLs provide greater flexibility for editing individual rules without deleting the entire ACL.
NEW QUESTION # 32
In a route-policy, which of the following BGP attributes can be used in apply clauses?
- A. MED
- B. AS_Path
- C. Tag
- D. Local-Preference
Answer: A,D
Explanation:
In a route-policy, attributes such as MED (Multi-Exit Discriminator) and Local-Preference can be used in apply clauses to influence BGP route selection. Attributes like AS_Path and Tag are typically matched or filtered but not directly applied in the apply clause .
NEW QUESTION # 33
Which of the following statements about the forwarding plane of a switch is false?
- A. Can encapsulate and decapsulate packets.
- B. Provides high-speed and non-blocking data channels.
- C. Can collect packet statistics.
- D. Consists of main control boards and interface boards.
Answer: C
NEW QUESTION # 34
As a next-generation wireless technology, Wi-Fi 6 greatly improves bandwidth rate and performance. Which of the following statements is false about the features of Wi-Fi 6?
- A. Uses TWT technology to reduce terminal power consumption.
- B. Uses OFDMA technology to achieve high concurrency.
- C. Realizes zero latency, ensuring efficient service running.
- D. Provides high bandwidth, up to 9.6 Gbps.
Answer: C
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Features of Wi-Fi 6:
* Wi-Fi 6 (802.11ax) introduces several new technologies to improve network efficiency, reduce latency, and optimize power usage:
* OFDMA (Orthogonal Frequency Division Multiple Access): Allows multiple devices to transmit simultaneously, improving concurrency.
* TWT (Target Wake Time): Reduces power consumption by scheduling communication times for devices.
* High Bandwidth: Supports up to 9.6 Gbps, significantly faster than Wi-Fi 5.
2. Why Zero Latency is Incorrect:
* While Wi-Fi 6 reduces latency compared to earlier standards, zero latency is not achievable due to inherent delays in network communication.
* The statement "Realizes zero latency" is misleading and technically inaccurate.
3. Analysis of Each Option:
Option A: Uses OFDMA technology to achieve high concurrency.
* Correct (True Statement).
* OFDMA is a core feature of Wi-Fi 6 that improves concurrent communication.
Option B: Realizes zero latency, ensuring efficient service running.
* Incorrect (False Statement).
* Wi-Fi 6 reduces latency but cannot eliminate it entirely.
Option C: Provides high bandwidth, up to 9.6 Gbps.
* Correct (True Statement).
* Wi-Fi 6 supports a theoretical maximum bandwidth of 9.6 Gbps.
Option D: Uses TWT technology to reduce terminal power consumption.
* Correct (True Statement).
* TWT schedules communication times, allowing devices to enter low-power states and conserve battery life.
4. Summary:
* The false statement is B, as Wi-Fi 6 does not achieve zero latency.
NEW QUESTION # 35
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