H12-821_V1.0 Questions Prepare with Learning Information! 2026 Regularly updated
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NEW QUESTION # 271
Which of the following statements regarding different LSA types is false?
- A. LS Ack packets contain complete LSA information.
- B. LS Request packets contain only LS Type, LS ID, and Advertising Router.
- C. LS Update packets contain complete LSA information.
- D. DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.
Answer: C
NEW QUESTION # 272
Which of the following descriptions of OSPF virtual connections is incorrect?
- A. Virtual connections are actually logical channels
- B. Virtual links must be configured in two ASBRs
- C. Virtual connections increase the complexity of the network
- D. The area through which the virtual connection is configured must have all routing information.
Answer: B
NEW QUESTION # 273
Which of the following descriptions about BGP route optimization is correct?
- A. BGP compares the originality of routes strictly according to the sequence when selecting routes. If the optimal route can be selected through the previous attributes, the latter comparison cannot be judged.
- B. When BGP receives multiple routes to the same destination, it will select the optimal route according to the routing rules, and then deliver the optimal route to the IP routing table to guide data traffic forwarding
- C. When BGP selects a route, if it cannot be optimized according to the conditions, it will automatically carry out load sharing
- D. When there are multiple effective routes in BGP, BGP Speaker only advertises the optimal route to the peer
Answer: D
NEW QUESTION # 274
The interface using Silent-Interface will not receive and send OSPF messages, but directly connected routes can be advertised to OSPF.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 275
On an STP network, only the designated port processes inferior BPDUs. On an RSTP network, a port with any role processes inferior BPDUs.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
STP and RSTP Behavior:
STP: Only the designated port processes inferior BPDUs. Inferior BPDUs are received from downstream switches and typically indicate topology changes.
RSTP: All ports, regardless of role (root, designated, or alternate), process inferior BPDUs to ensure faster convergence.
Behavior Difference:
RSTP improves convergence by allowing any port to process inferior BPDUs, unlike STP, which restricts this function to designated ports.
NEW QUESTION # 276
The monitoring plane is generally composed of the monitoring unit of the main control board and the interface board, which can independently complete the system's environmental monitoring. Which of the following aspects of environmental monitoring can be completed by the monitoring plane? (Multiple choice)
- A. Fan control
- B. Temperature detection
- C. System power on and off detection
- D. Voltage detection
Answer: A,B,C,D
NEW QUESTION # 277
For link state routing protocols, the use of multi-region and hierarchical network design can speed up route convergence, reduce the load of devices in a single area, and make the network more scalable.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 278
The Open message of BGP is used to establish a peer connection. Which of the following is not the parameter information carried in the Open message?
- A. AS number
- B. Router ID of the sender
- C. BGP version number
- D. TCP port number
Answer: D
NEW QUESTION # 279
The traffic policy supports calling on the interface, but only supports calling the traffic policy in the outbound direction of the interface.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 280
Which of the following descriptions about ASPF and Server-map is correct?
- A. The session table is a concrete reflection of the connection status of the two parties in the communication
- B. After the message hits the Server-map table, it needs to be controlled by the security policy
- C. When the firewall receives the message, it will check whether it matches the Server-map table
- D. The Server-map table is generated by the firewall based on the session table
Answer: D
NEW QUESTION # 281
VRRP defines three states. Only the device in which state can forward packets destined for a virtual IP address?
(Write in full and capitalize the first letter.)
Answer:
Explanation:
Master
Explanation:
VRRP defines the following states:Initialize- The router is starting up or has not joined a VRRP group.
Backup- The router is in standby and monitors the Master.Master- Theonly statewhere the deviceforwards trafficfor thevirtual IP address.Only the router in theMasterstate owns the virtual MAC and responds to ARP for the virtual IP.Reference from Huawei HCIP-Datacom-Core Technology Study Guide:"In VRRP, only the Master forwards packets destined for the virtual IP address. Backup routers take over only if the Master fails." (Chapter: VRRP Concepts - Section: State Roles and Transitions)
NEW QUESTION # 282
Which of the following statements is false?
- A. If two devices have the same router priority, the device with a larger router ID has a higher election priority.
- B. When a router with the highest router priority joins an OSPF network, this router will become the new DR.
- C. A device with a higher router priority has a higher election priority.
- D. If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.
Answer: B
Explanation:
The election of a Designated Router (DR) and Backup Designated Router (BDR) occurs during the OSPF network's initial setup or upon the failure of an existing DR. A new router joining an OSPF network does not automatically preempt the current DR, even if it has the highest priority. DR and BDR elections are not preemptive. The other statements are correct regarding OSPF DR/BDR election processes .
NEW QUESTION # 283
IGMP group entries play an important role in multicast forwarding. An administrator runs a command to view information about a multicast entry. The information is as follows:
sql
Copy
<HUAWEI> display igmp group
Interface group report information
Vlanif100(10.1.6.2):
Total 1 IGMP Group reported
Group Address Last Reporter Uptime Expires
225.1.1.2 10.1.6.10 00:02:04 00:01:17
Given this, which of the following statements are true?
- A. This entry can be used to construct the corresponding (S, G) entry.
- B. Expires indicates the aging time of the IGMP group.
- C. This entry is created when the device receives an IGMP Join message from a user.
- D. 225.1.1.2 is the address of the group that the user joins.
Answer: B,C,D
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Understanding the IGMP Group Entry:
The IGMP group entry contains key information about multicast groups on the interface:
* Group Address (225.1.1.2): The multicast group address that the user has joined.
* Last Reporter (10.1.6.10): The IP address of the last host that sent an IGMP Report message for this group.
* Uptime: The duration since the group was first reported.
* Expires: The remaining time before the group entry ages out if no further reports are received.
2. Analysis of Each Statement:
Option A: This entry can be used to construct the corresponding (S, G) entry.
* Incorrect.
* This is a group entry for IGMP, which contains information about the group (G) but does not include a specific source (S). (S, G) entries are created in PIM (Protocol Independent Multicast), not IGMP.
Option B: This entry is created when the device receives an IGMP Join message from a user.
* Correct.
* IGMP Join messages are used by hosts to signal their intent to join a multicast group. When such a message is received, the group entry is created.
Option C: Expires indicates the aging time of the IGMP group.
* Correct.
* The "Expires" field shows the remaining time before the group entry ages out if no further IGMP reports are received.
Option D: 225.1.1.2 is the address of the group that the user joins.
* Correct.
* The "Group Address" field explicitly states that 225.1.1.2 is the multicast group that the user has joined.
3. Summary:
* Correct Options: B, C, D
NEW QUESTION # 284
As shown in the figure, all three switches run the RSTP protocol, so which one of the following descriptions about the topology convergence process is correct?
- A. The edge port of SW3 will immediately enter the Forwarding state after a round of P/A mechanism
- B. The upstream link port of SW2 will immediately enter the Forwarding state after receiving the RSTBPDU with the Proposal bit set from SW1.
- C. The device interconnection port of the downstream link quickly enters the Forwarding state through the P/A mechanism
- D. When the network is initialized, the ports of all the switches in the figure are designated ports and are in the Discarding state
Answer: A
NEW QUESTION # 285
In inter-AC roaming scenarios, an AC can function as the mobility server of multiple mobility groups, but can be added only to one mobility group.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
In inter-AC roaming scenarios, an AC (Access Controller) can serve as the mobility server for multiple mobility groups, enabling it to manage roaming among multiple groups. However, an AC can only belong to one specific mobility group. This constraint ensures that mobility management remains streamlined and avoids conflicts. Huawei WLAN mobility configuration guides validate this setup .
NEW QUESTION # 286
On the VRP platform, when we introduce OSPF routing to ISIS, if COST is not specified, the cost value will be set to 16 by default.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 287
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