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Huawei H12-821_V1.0 Exam is recognized globally and is highly regarded in the IT industry. It is a valuable certification that can open up new career opportunities and increase earning potential. H12-821_V1.0 exam is conducted online and consists of multiple-choice questions, simulations, and case studies. To pass the exam, candidates must demonstrate a deep understanding of the core technologies used in data communication and their practical applications in real-world scenarios.
Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) Exam is a certification exam designed to test the knowledge and skills of professionals in the field of data communications. It is an intermediate-level certification that covers a wide range of topics related to network architecture, protocols, and technologies. H12-821_V1.0 exam is intended to validate the knowledge and skills of professionals who are responsible for the design, implementation, and maintenance of data communication networks.
NEW QUESTION # 705
Which of the following are the advantages of electing DR/BDR in the MA network? (Multiple choice)
- A. Facilitate synchronization of link status
- B. Reduce duplicate traffic
- C. OSPF neighbor can be established as long as TCP is reachable
- D. No multicast packets are needed to maintain neighbor status
Answer: A,B
NEW QUESTION # 706
If you want to achieve communication between different protocols, you can only use route introduction.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 707
During BGP route summarization configuration, the keyword can be used to suppress all specific routes so that only the summary route is advertised.
The summary route carries the Atomic-aggregate attribute rather than the community attributes of specific routes.
Answer:
Explanation:
suppress-spec-map
Explanation:
Understanding BGP Route Summarization:
In Border Gateway Protocol (BGP),route summarizationis a technique used to aggregate multiple specific prefixes into a broader summary prefix. This reduces the size of routing tables and improves routing efficiency.
Summarization helps to hide unnecessary details from other parts of the network while still maintaining connectivity.
HCIP-Datacom-Core Technology Training Material (BGP Route Summarization).
Suppressing Specific Routes:
When summarizing routes, thesuppress-spec-map keywordis used to suppress specific prefixes so that only the summarized route is advertised.
The suppressed routes are not advertised to BGP peers; instead, only the summary route is propagated.
Reference:HCIP-Datacom Advanced Routing & Switching Technology (BGP Attributes and Summarization Techniques).
Atomic-Aggregate Attribute:
The summary route generated during BGP route summarization carries theAtomic-aggregateattribute. This attribute indicates that the summary route might not provide the exact path information available in the original specific routes.
Additionally, when using thesuppress-spec-mapoption, the specific routes' attributes, such ascommunityattributes, are not included in the summary route.
Reference:HCIP-Datacom-Core Technology Training Material (BGP Path Attributes).
Conclusion:
Thesuppress-spec-mapkeyword is used to suppress specific routes when performing BGP summarization. The summarized route includes theAtomic-aggregateattribute but does not carry community attributes from the suppressed routes.
NEW QUESTION # 708
Huawei modular devices have multiple hardware modules that provide different functions. Match the following hardware modules with their functions.
Answer:
Explanation:
Explanation:
The hardware modules of Huawei modular devices and their functions are:
* Main Processing Unit (MPU): Provides control and management planes for the entire system, responsible for protocol processing, system security, and software upgrades.
* Switch Fabric Unit (SFU): Provides the data plane, enabling high-speed data switching between service modules.
* Line Processing Unit (LPU): Manages data forwarding, offering various interfaces (optical and electrical) for data access.
NEW QUESTION # 709
On the network shown in the following figure, the management VLAN is VLAN 10, and the AP is configured to obtain an IP address on the network segment 10.1.1.0/24 through DHCP. The AP, AC, and AR function as the DHCP client, DHCP relay agent, and DHCP server, respectively. Which of the following configurations for the DHCP relay agent and DHCP server are correct?
- A. [AC] dhcp server group AP
[AC-dhcp-server-group-AP] dhcp-server 172.21.1.2
[AC-dhcp-server-group-AP] quit
[AC] interface Vlanif 10
[AC-Vlanif 10] dhcp select relay
[AC-Vlanif 10] dhcp relay server-select AP
[AC-Vlanif 10] quit - B. [AC] dhcp server group AP
[AC-dhcp-server-group-AP] dhcp-server 10.1.1.2
[AC-dhcp-server-group-AP] quit
[AC] interface Vlanif 10
[AC-Vlanif 10] dhcp select relay
[AC-Vlanif 10] dhcp relay server-select AP
[AC-VlaniflO] quit - C. [AR] ip pool AP
[AR-ip-pool-AP] network 172.21.1.0 mask 24
[AR-ip-pool-AP] gateway-list 172.21.1.2
[AR-ip-pool-AP] excluded-ip-address 172.21.1.1
[AR-ip-pool-AP] quit
[AR] interface GigabitEthernet 0/0/1
[AR-GigabitEthernetO/0/1] dhcp select global
[AR-GigabitEthernetO/0/1] quit
[AR] ip route-static 10.1.1.0 255.255.255.0 172.21.1.1 - D. [AR] ip pool AP
[AR-ip-pool-AP] network 10.1.1.0 mask 24
[AR-ip-pool-AP] gateway-list 10.1.1.2
[AR-ip-pool-AP] excluded-ip-address 10.1.1.1
[AR-ip-pool-AP] quit
[AR] interface GigabitEthernet 0/0/1
[AR-GigabitEthernetO/O/1] dhcp select global
[AR-GigabitEthernet0/0/l] quit
[AR] ip route-static 10.1.1.0 255.255.255.0 172.21.1.1
Answer: A,D
Explanation:
Option A correctly configures the DHCP relay agent (AC) to forward requests to the DHCP server using VLAN 10.Option B correctly configures the DHCP server (AR) with the correct IP pool (10.1.1.0/24), gateway, and excluded IP addresses. The static route to 10.1.1.0 through 172.21.1.1 ensures proper routing .
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NEW QUESTION # 710
When a stateful inspection firewall forwards subsequent data packets (not the first packet), which of the following is mainly based on?
- A. Route table
- B. OFIB table
- C. MAC address table
- D. Session table
Answer: D
NEW QUESTION # 711
When OSPF external routes are imported, Metric-Type-1 or Metric-Type-2 will be used, so which of the following is the calculation method of the routing cost of Metric-Type-1 type?
- A. The sum of the cost from the nearest ABR to the ASBR and the cost from the ASBR to the destination address of the route
- B. The sum of the cost from the device to the corresponding ASBR and the cost from the ASBR to the destination address of the route
- C. The cost from this device to the corresponding ASBR
- D. Cost from the ASBR to the destination address of the route
Answer: B
NEW QUESTION # 712
There are many different types of risks in the network. According to the TCP/IP protocol stack, please match the risk type with each layer of the TCP/IP protocol stack.
Answer:
Explanation:
NEW QUESTION # 713
The PIM (*, G) routing table entry lacks inbound interface information, so multicast traffic cannot be forwarded based only on the (*, G) table.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 714
Which of the following statements regarding the BGP error display of a router false?
- A. The neighbor address of this router is 10.1.1.5.
- B. The error may be caused by the incorrect neighbor address.
- C. Error Type indicates that the BGP error is caused by the neighbor relationship error.
- D. The error occurred at 12:40:39 on March 22, 2010.
Answer: B
Explanation:
The error indicates "Incorrect remote AS," which refers to a mismatch in the autonomous system (AS) numbers during BGP peer configuration. This issue is unrelated to the neighbor address. The neighbor address (10.1.1.5) and timestamp (2010-03-22 12:40:39) provided in the output are correct, and the error type confirms a neighbor relationship issue .
NEW QUESTION # 715
As shown in the figure, R1 and R2 are in a VRRP backup group, if R1 fails, which of the following actions will R2 perform?
- A. Switch to Master device after about 3.61 seconds
- B. Switch to Master device after about 0.61 seconds
- C. Do nothing and keep the original state
- D. Switch to Master device after about 0.22 seconds
Answer: A
NEW QUESTION # 716
When dual-link hot backup is configured in a WLAN group, the AP will establish CAPWAP links with the primary AC and backup AC respectively.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 717
Which of the following prefix lists can match any routing entry except the default route?
- A. ip ip-prefix huawei index 10 permit 0.0.0.0 0 less-equal 32
ip ip-prefix huawei index 20 deny 0.0.0.0 0 - B. ip ip-prefix huawei index 10 permit 0.0.0.0 0
ip ip-prefix huawei index 20 deny 0.0.0.0 0 less-equal 32 - C. ip ip-prefix huawei index 10 permit 0.0.0.0 0 less-equal 32
- D. ip ip-prefix huawei index 10 deny 0.0.0.0 0 less equal 32
ip ip-prefix huawei index 20 permit 0.0.0.0 0 - E. ip ip-prefix huawei index 10 deny 0.0.0.0 0
- F. ip ip-prefix huawei index 10 deny 0.0.0.0 0
ip ip-prefir huawei index 20 permit 0.0.0.0 0 less-equal 32
Answer: F
NEW QUESTION # 718
DCN is a network that provides interconnection within the data center and interconnection between the internal and external egresses of the data center. A DCN usually consists of a series of network devices that concentrate all functions in one area.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 719
Which of the following scenarios is not suitable for deploying interface policy routing?
- A. On the core switch, direct the mutual access traffic between the internal network and the external network to the side-mounted security detection equipment.
- B. On the core switch, direct the mutual access traffic between the internal network and the external network to the bypass AC device.
- C. Two different OSPF domains implement multipoint bidirectional redistribution
- D. In the scenario where the enterprise network has multiple ISP exits, different network segments of the intranet access the Internet through different ISP exits.
Answer: C
NEW QUESTION # 720
OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
OSPF supports both area-level and interface-level authentication. When both are configured, interface authentication takes precedence over area authentication. This hierarchy ensures that specific interface-level configurations override the broader area-level settings when applicable .
NEW QUESTION # 721
Which of the following statements are true about theLocal_Prefattribute in BGP? (Choose all that apply)
- A. The default Local_Pref value is 0.
- B. The Local_Pref value remains unchanged during transmission unless it is affected by a routing policy.
- C. The Local_Pref attribute can be transmitted to all BGP peers.
- D. The greater the value of the Local_Pref attribute, the higher the priority.
Answer: B,D
Explanation:
A is false- Thedefault value of Local_Pref is 100, not 0.
B is false-Local_Pref is not advertised to EBGP peers, it is only sent toIBGP peers.
C is correct- TheLocal_Pref value stays constantunless modified by a route-policy or filter.
D is correct-Higher Local_Pref values indicate preferred paths, so BGP prefers the path with the highest Local_Pref among multiple options.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"Local_Pref is used to select the best outbound path for traffic leaving the AS. It is only shared among IBGP peers and defaults to 100. The higher the value, the more preferred the route." (Chapter: BGP Path Attributes - Section: Local Preference)
NEW QUESTION # 722
In route-policy, what are the BGP attributes that can be used in the apply clause? (Multiple choice)
- A. Local-Preference
- B. MED
- C. Tag
- D. AS-Path
Answer: A,B,D
NEW QUESTION # 723
By default, some security zones are created when Huawei firewalls are enabled. Which of the following security zones is created by users?
- A. DMZ
- B. Trust
- C. Local
- D. ISP
Answer: A
Explanation:
By default, Huawei firewalls create security zones such as Trust, Untrust, and Local. The DMZ (Demilitarized Zone) is a security zone explicitly created by users. A DMZ is used to isolate an internal network from the external one, providing an additional layer of security by placing public-facing services (e.
g., web servers) in this intermediary zone. This setup ensures that if a public-facing service is compromised, the internal network remains secure. Huawei Firewall configuration steps confirm this zoning principle, making DMZ creation an explicit user-driven action .
NEW QUESTION # 724
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. Obtain relevant information after the BPDU message
- B. Close the port
- C. Forward BPDU messages as required
- D. Directly discard the BPDU message
Answer: B
NEW QUESTION # 725
A certain network structure and OSPF partitions are shown in the figure. In the figure, except RTA, RTB, RTC and RTD are all ABR routers.
- A. True
- B. False
Answer: B
NEW QUESTION # 726
When pinging the IP address of an interface of the firewall on the firewall, these packets will be handed over to the internal module of the firewall for processing and will not be forwarded.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 727
There is an existing switch connected to a designated port through a certain port, but this port does not forward any packets, but can monitor network changes by receiving BPDUs, so which of the following options should the role of this port be?
- A. Designate port
- B. Disable port
- C. Root port
- D. Alternate port
Answer: D
NEW QUESTION # 728
Huawei modular devices have multiple hardware modules that provide different functions. Match the following hardware modules with their functions.
Answer:
Explanation:
Explanation:
The hardware modules of Huawei modular devices and their functions are:
* Main Processing Unit (MPU): Provides control and management planes for the entire system, responsible for protocol processing, system security, and software upgrades.
* Switch Fabric Unit (SFU): Provides the data plane, enabling high-speed data switching between service modules.
* Line Processing Unit (LPU): Manages data forwarding, offering various interfaces (optical and electrical) for data access.
NEW QUESTION # 729
In BGP routing rules, which of the following options is used to determine the priority of the Origin attribute?
- A. Incomplete > EGP >BGP
- B. IGP > EGP > Incomplete
- C. EGP > Incomplete > IGP
- D. IGP > Incomplete >EGP
Answer: B
NEW QUESTION # 730
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Huawei H12-821_V1.0 Certification Exam is an excellent opportunity for IT professionals who want to enhance their career prospects and demonstrate their expertise in data communication. HCIP-Datacom-Core Technology V1.0 certification is highly valued by employers and is recognized globally. Candidates who pass the exam will join a community of certified professionals who are recognized for their knowledge, skills, and dedication to the field of data communication.
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