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The Huawei H12-821_V1.0 exam covers a comprehensive range of topics, including network architecture and protocols, network security, virtualization technologies, and network management. To pass the exam, candidates must demonstrate their understanding of these concepts and their ability to apply them in real-world scenarios. HCIP-Datacom-Core Technology V1.0 certification exam is a combination of theoretical and practical questions, and candidates are required to demonstrate their proficiency in both.
NEW QUESTION # 750
The Interface \P address and VRRP virtual IP address can be the same.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 751
Which of the following parameters are modified, the IS-IS neighbor relationship needs to be re- established? (Multiple choice)
- A. Modify the Level of the IS-IS interface
- B. Modify the IF address of the IS-IS interface
- C. Modify the sending interval of llH on the IS-IS interface
- D. Modify the Cost value of the IS-IS interface
Answer: A,B
NEW QUESTION # 752
When a routing protocol introduces other routing protocols, in order to only introduce a part of the routing information that meets the conditions and set certain attributes of the imported routing information, the route-policy tool can only be used.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 753
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. TRUE
- B. FALSE
Answer: A
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 # 754
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. Random access
- B. None
- C. AC1
- D. AC2
Answer: B
NEW QUESTION # 755
The routing selection tool route-policy can filter and set BGP attributes based on predefined conditions, so it is often used to define policies for BGP Peer and is often used during route generation. By default, all unused Routes from the North Configuration are all rejected through route-policy.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 756
There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.
Answer:
Explanation:
SPT
* Routing Entries in PIM
* (S, G) entries: Represent the shortest path tree (SPT) from a specific source (S) to a specific multicast group (G). These entries are created after data packets are transmitted directly from the source to the receivers.
* (S, G) entries are used in both PIM-DM and PIM-SM modes.
* PIM-DM and PIM-SM Modes
* In PIM-DM, multicast traffic is initially flooded throughout the network and pruned where no receivers exist. (S, G) entries represent source-specific paths created after the flooding stage.
* In PIM-SM, multicast traffic initially flows through a shared tree, but (S, G) entries are created when the network switches to the SPT for more efficient forwarding.
* HCIP-Datacom-Core Reference
* The functionality and application of (S, G) routing entries are detailed in multicast and PIM configuration chapters.
NEW QUESTION # 757
Which of the following messages does BGP use to report error messages and terminate peer relationships?
- A. Open
- B. Notification
- C. Keepalive
- D. Update
Answer: B
NEW QUESTION # 758
IGMP3 not only supports the general group query of IGMPv1 version and the specific group query of IGMPv2 version, but also supports the specified source/group query of IGMPv3 version.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 759
Deploy BFD and OSPF association on the direct link. If the physical link is disconnected, please arrange the BFD processing process in order.
Answer:
Explanation:
NEW QUESTION # 760
BGP routers can send incremental BGP routing updates or perform periodic updates.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 761
Which of the following options is not the purpose of OSPF Hello message exchange?
- A. Discover neighbor routers
- B. Negotiate some necessary parameters
- C. Deliver link status information
- D. Check if neighbor is alive
Answer: C
NEW QUESTION # 762
IGMP SSM mapping allows IGMPv1 and IGMPv2 group members to access the SSM network if a multicast source is manually bound to a multicast group. Which of the following statements are true about IGMP SSM mapping?
- A. If IGMP SSM mapping is disabled, IGMPv1 and IGMPv2 do not support multicast deployment in SSM mode.
- B. The SSM group address ranges from 232.0.0.0 to 232.255.255.255.
- C. IGMP SSM mapping does not apply to IGMPv3 Report messages. To provide SSM service to hosts running any IGMP version on a network segment, IGMPv3 must be enabled on the multicast router's interface that is connected to the network segment.
- D. IGMP SSM mapping converts (*, G) information in IGMPv1 and IGMPv2 Report messages to (S, G) information according to static SSM mapping entries configured on a multicast switch.
Answer: A,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Source-Specific Multicast (SSM) uses (S, G) addressing instead of the traditional (*, G) used in Any- Source Multicast (ASM).
* IGMP SSM Mapping is used to enable IGMPv1 and IGMPv2 hosts (which do not support explicit source selection) to work in an SSM environment by mapping (*, G) to (S, G).
* A. TRUE # The mapping allows IGMPv1/v2 to function in an SSM network.
* B. TRUE # IGMPv3 natively supports SSM, so SSM mapping is not needed for IGMPv3.
* C. FALSE # The SSM address range is 232.0.0.0/8 in IPv4, but this is not the only range used for SSM globally.
* D. TRUE # If IGMP SSM mapping is disabled, IGMPv1/v2 cannot work in an SSM network because they do not support explicit source selection.
# Reference: Huawei HCIA-Datacom Study Guide, IGMP Versions and SSM Mapping.
NEW QUESTION # 763
In PIM-SM, which of the following descriptions about RP is incorrect?
- A. For a multicast group, there can be multiple RP addresses at the same time to improve network reliability.
- B. All multicast streams in the shared tree are forwarded to the receiver through the RP.
In EPIM-SM, different RP addresses can be configured for different multicast groups to achieve traffic load sharing. - C. In PIM-SM, multicast data traffic does not necessarily have to be forwarded through RFP.
- D. In a multicast network, multiple C-RPs can exist at the same time to improve the high availability of the RP.
Answer: A
NEW QUESTION # 764
Which of the following descriptions about the ACL matching mechanism are correct? (Multiple choice)
- A. When the packet matches the ACL, if the packet hits the rule and the ACL action is "permit", the matching result is "match". When the packet hits the rule and the ACL action is "deny", it returns The result is "does not match"
- B. If the ACL exists but there is no rule inside the ACL, the result will be directly returned as "does not match"
- C. When the matching order of the ACL is the config mode, it will be matched in descending order of the serial number
- D. After the packet matches the ACL, only two results will be generated: "match" and "mismatch"
Answer: B,D
NEW QUESTION # 765
The function of Hello message in PIM-SM is? (Multiple choice)
- A. Election network segment BDR
- B. Establish and maintain neighbor relationships
- C. Neighbor capability negotiation
- D. Register with RP
Answer: B,C
NEW QUESTION # 766
The following figure shows the OSPF network of an enterprise and the OSPF configurations of R1. Which of the following statements is false about the network?
- A. R2 can access the server.
- B. GE 0/0/1 of R1 cannot send OSPF packets.
- C. GE 0/0/1 of R1 cannot accept OSPF packets.
- D. The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.
Answer: D
Explanation:
Silent Interface Explanation
* The silent-interface command is used to prevent OSPF from sending or receiving OSPF packets on the specified interface (GE 0/0/1). This disables OSPF adjacency establishment and stops route advertisement for that interface.
Network Observations
* Statement A: R2 can access the server.This is correct, as the silent interface does not impact data traffic, only OSPF-related communication.
* Statement B: GE 0/0/1 of R1 cannot send OSPF packets.Correct due to the silent-interface configuration.
* Statement C: The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.This is correct, as the silent interface prevents route advertisement.
* Statement D: GE 0/0/1 of R1 cannot accept OSPF packets.Correct, as the silent interface configuration blocks packet reception.
HCIP-Datacom-Core Reference
* OSPF interface command behavior is outlined in the configuration and lab examples sections.
NEW QUESTION # 767
Which of the following descriptions of static NAT is incorrect?
- A. When using static NAT, each private address has a corresponding and fixed public address.
- B. Static NAT can map the port number of the private address to different port numbers of the public address. For example, the ICP23 port of the private address can be converted to the TCP20320 port of the public address.
- C. Using static NAT, when the external network accesses the internal network, the public address (destination address) carried in the packet will also be converted by the AT device into the corresponding private address.
- D. The relationship between the static NAT private address and the public address is one-to-one
Answer: A
NEW QUESTION # 768
Which of the following values can be set for the security level of the security zone customized by the USG series firewall? (Multiple choice)
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B,C
NEW QUESTION # 769
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Huawei H12-821_V1.0 certification exam is a professional-level certification that validates the skills and knowledge required to design, deploy, and manage large-scale data communication networks using Huawei technologies. HCIP-Datacom-Core Technology V1.0 certification is recognized globally and is suitable for network engineers, network architects, and network administrators who are responsible for designing and managing large-scale data communication networks. To pass the exam, candidates must have a thorough understanding of the topics covered in the exam and must be able to apply this knowledge in real-world scenarios.
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