Huawei H12-811_V2.0 Dumps Updated Aug 03, 2026 WIith 87 Questions
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NEW QUESTION # 14
The rules in an ACL may overlap. If packets match the rules with loose conditions, the later ACL rules are not processed. In this case, packets cannot match the rules with strict conditions.
Therefore, the rules with strict conditions must be arranged in front lines and those with loose conditions must be arranged towards the end.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Access Control Lists (ACLs) are processed in sequential order, meaning that once a packet matches a rule, subsequent rules are ignored. To ensure that more specific (strict) conditions are applied, strict rules should be listed first, followed by loose rules.
NEW QUESTION # 15
Which of the following commands can be used to check OSPF routes in the global routing table?
- A. display ip routing-table protocol ospf
- B. display ospf routing
- C. display ospf interface
- D. display ospf peer
Answer: A
Explanation:
To check OSPF-learned routes in the global IP routing table , the correct command is display ip routing- table protocol ospf , so option A is correct. This command filters the routing table and shows only the routes whose source protocol is OSPF. It is especially useful when verifying whether OSPF-learned routes have been successfully installed into the forwarding table after neighbor establishment and LSDB calculation.
Option B , display ospf peer, is used to check OSPF neighbor information and adjacency states, not the routing table. Option C , display ospf interface, shows OSPF-related parameters on interfaces such as timers, network type, and cost. Option D , display ospf routing, displays OSPF route information maintained by the OSPF process itself, but the question specifically asks about routes in the global routing table , which is the RIB used for actual forwarding decisions. HCIA-Datacom distinguishes between protocol-specific route information and the final routing table seen by the device. Understanding this distinction helps engineers verify whether a protocol has only learned topology information or has actually produced usable forwarding entries.
NEW QUESTION # 16
Which of the following information is displayed when an entered command is incomplete on the Versatile Routing Platform (VRP)?
- A. Error: Incomplete command found at 'A' position
- B. Error: Ambiguous command found at 'A' position
- C. Error: Too many parameters found at 'A' position
- D. Error: Wrong parameter found at 'A' position
Answer: A
NEW QUESTION # 17
In the figure, a TCP connection has been established between PC1 and PC2. After PC1 sends a data segment to PC2, which of the following is the acknowledgment number in the packet returned by PC2?
- A. a+22
- B. b+23
- C. b+1
- D. a+44
Answer: D
Explanation:
In TCP, the acknowledgment number indicates the next byte that the receiver expects to receive. In the figure, PC1 sends a TCP segment to PC2 with sequence number = a+22 and payload length = 22 bytes .
Since TCP sequence numbers count bytes, the last byte carried in this segment corresponds to sequence number a+43 . Therefore, after PC2 successfully receives this data, it sends back an ACK indicating that the next expected byte is a+44 .
That is why option B is correct. This is a standard TCP reliability mechanism. TCP does not acknowledge
"packets" as units; it acknowledges the byte stream. The ACK number always points to the next byte expected from the peer. The source and destination port numbers identify the session, but the sequence and acknowledgment numbers track ordered delivery. HCIA-Datacom uses this mechanism to explain connection- oriented transport, reliable delivery, retransmission, and traffic control. Understanding how the payload length affects sequence progression is essential when analyzing packet captures and troubleshooting TCP communication problems in enterprise networks.
NEW QUESTION # 18
The traditional Fat AP networking usually applies to WLANs of small and micro stores. For a large-scale WLAN, the WAC + Fit AP networking is typically used. Which of the following statements are true about the WAC + Fit AP networking architecture? (Select all that apply)
- A. Layer 2 connectivity is required for the WAC and APs to communicate with each other using the CAPWAP protocol.
- B. Users need to log in to the Fit AP to configure wireless services.
- C. Fit APs provide 802.11-based wireless access for STAs and function as bridges between wired and wireless networks.
- D. The WAC controls and manages all APs on the WLAN.
Answer: C,D
Explanation:
In a WAC + Fit AP architecture, the WAC (Wireless Access Controller) centrally manages and controls the Fit APs, so option A is correct. Service configurations such as SSIDs, security policies, radio parameters, and access control are generally delivered from the WAC to the APs. The Fit AP mainly forwards wireless user traffic and executes the configuration issued by the controller.
Option D is also correct because a Fit AP provides 802.11 wireless access for stations (STAs) and serves as a bridge between the wireless side and the wired network. This is one of its basic roles in enterprise WLAN deployment. Option B is incorrect because users or administrators do not normally need to log in to each Fit AP individually to configure wireless services; centralized management by the WAC is the whole advantage of this architecture. Option C is incorrect because CAPWAP communication between the WAC and AP does not require Layer 2 adjacency ; the WAC and AP can communicate over Layer 3 as long as IP connectivity exists. HCIA-Datacom emphasizes centralized configuration, simplified operations, and scalable deployment as key benefits of WAC + Fit AP networking.
NEW QUESTION # 19
Which of the following statements regarding static routing and dynamic routing is incorrect?
- A. The static routing can be easily configured and managed on the enterprise network.
- B. The static routing can automatically recover when a link failure is encountered.
- C. Dynamic routing will use more resources than static routes.
- D. The use of dynamic routing is more convenient for the administrator to manage the network following network convergence.
Answer: B
Explanation:
Static routing does not automatically recover from link failures; manual reconfiguration is required if a static route path becomes invalid. Dynamic routing protocols, on the other hand, adapt automatically to network changes, adjusting routes as needed.
NEW QUESTION # 20
When a Huawei network device functions as an FTP server, which of the following are possible causes of an FTP client failing to log in to the FTP server? (Select all that apply)
- A. The FTP user name and password are not configured.
- B. The authorized directory is not specified for FTP users.
- C. The FTP server function is not enabled on the device.
- D. The network between the device and the FTP client is unreachable.
Answer: A,B,C,D
Explanation:
All four options are possible causes of FTP login failure, so the correct answer is A, B, C, and D.
Option A is correct because if the FTP server function is not enabled on the Huawei device, the device cannot provide FTP services and the client cannot log in. Option B is also correct because if the authorized directory is not specified for the FTP user, the user may not be able to complete login or access file services properly, depending on the FTP user configuration requirements. Option C is correct because an FTP user account must be configured with the required username and password; otherwise, authentication cannot succeed. Option D is also correct because if the network between the FTP client and the device is unreachable, the client cannot establish the FTP connection at all.
In HCIA-Datacom troubleshooting, FTP login failure is usually checked from four aspects: service enablement, user configuration, permission or directory authorization, and network connectivity. This question tests standard remote maintenance troubleshooting logic for file transfer services on Huawei network devices.
NEW QUESTION # 21
Both SNMP Trap and Inform Request are used by managed devices to send alarms to the NMS. Inform Request requires an acknowledgment from the NMS, whereas Trap does not.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
This statement is true . In SNMP, both Trap and Inform messages are used by managed devices to proactively report alarms or events to the Network Management System (NMS) . However, their reliability behavior is different. A Trap is sent without requiring an acknowledgment from the NMS. Once it is transmitted, the sender does not confirm whether the manager actually received it.
By contrast, an Inform Request requires the NMS to send a response confirming receipt. If the managed device does not receive the acknowledgment within the expected time, it can retransmit the Inform message.
Because of this, Inform is considered more reliable than Trap, although it also introduces slightly more overhead. HCIA-Datacom highlights this difference when explaining SNMP-based monitoring and alarm reporting. In real network O & M scenarios, the choice between Trap and Inform depends on the required balance between reliability and simplicity. This question tests a very standard SNMP knowledge point: Trap is unacknowledged , while Inform is acknowledged . Understanding this distinction helps network engineers choose suitable alarm reporting mechanisms in enterprise monitoring platforms.
NEW QUESTION # 22
If a device running STP receives an RSTP configuration BPDU, it discards the BPDU.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
A device running Standard Spanning Tree Protocol (STP) is not compatible with Rapid Spanning Tree Protocol (RSTP) BPDUs and will discard them upon receipt. STP devices cannot interpret the additional RSTP fields, leading to discarded BPDUs.
NEW QUESTION # 23
Which of the following information is displayed when an entered command is incomplete on the Versatile Routing Platform (VRP)?
- A. Error: Incomplete command found at 'A' position
- B. Error: Ambiguous command found at 'A' position
- C. Error: Too many parameters found at 'A' position
- D. Error: Wrong parameter found at 'A' position
Answer: A
Explanation:
When a command entered on Huawei's Versatile Routing Platform (VRP) is incomplete, VRP generates an error message indicating that the command is incomplete at a specific position (designated by 'A'). This message helps administrators identify where additional parameters are needed to complete the command syntax. Other error messages indicate issues such as excess parameters or ambiguous commands.
NEW QUESTION # 24
On the network shown in the figure, all switches run STP. All links have a path cost of 20, and SW1 is the root bridge. What is the root path cost (RPC) of SW4?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
The root path cost (RPC) of a switch is the total path cost from that switch to the root bridge along the selected spanning-tree path. Since SW1 is given as the root bridge, its RPC is 0. Each link in the topology has a path cost of 20. To determine SW4's RPC, you identify the shortest active STP path from SW4 to SW1.
Based on the topology used in the question, SW4 reaches SW1 through a path containing two links. Therefore, the total root path cost is 20 + 20 = 40, which makes option B correct. This is a standard STP calculation. HCIA-Datacom uses RPC as one of the main comparison parameters in root-port election on non-root switches. A lower RPC means a better path toward the root bridge. If multiple candidate ports have the same RPC, the switch then compares the sender's bridge ID and port ID. This question checks whether the learner understands that RPC is cumulative across the spanning-tree forwarding path and is not simply the cost of a single directly connected link unless the switch is directly attached to the root bridge.
NEW QUESTION # 25
In the figure, a web client sends an HTTP request to a web server, and the router in between performs operations on the HTTP request. Which of the following statements are false about the router's operations? (Select all that apply)
- A. The router checks the content of the application-layer data and determines the port from which to send the data.
- B. The router removes the data frame header and checks the destination IP address.
- C. The router encapsulates a new destination IP address before sending the data.
- D. The router searches the IP routing table based on the port number in the transport layer header.
Answer: A,C,D
Explanation:
A router works mainly at the network layer. When it receives a frame, it removes the Layer 2 header and trailer, examines the destination IP address in the Layer 3 header, consults the routing table, selects the outgoing interface, and then re-encapsulates the packet into a new Layer 2 frame for the next hop. Therefore, statement B is true and is not part of the answer.
Statement A is false because the router does not create a new destination IP address during normal forwarding. The source and destination IP addresses remain unchanged end to end unless special functions such as NAT are used. Statement C is false because routing-table lookup is based on the destination IP address, not on TCP or UDP port numbers. Statement D is also false because normal IP routing does not inspect application-layer content to determine the outgoing interface. That decision is made from the network-layer destination address and the routing table. This question tests the layered forwarding logic of routers in TCP/IP networks.
NEW QUESTION # 26
The following command output is displayed on R1:
[R1] display aaa configuration
Domain Name Delimiter : @
Domainname parse direction : Left to right
Domainname location : After-delimiter
Administrator user default domain : default_admin
Normal user default domain : default
Domain : total: 256 used: 3
Authentication-scheme : total: 32 used: 2
Accounting-scheme : total: 32 used: 1
Authorization-scheme : total: 32 used: 2
Service-scheme : total: 256 used: 0
Recording-scheme : total: 32 used: 0
Local-user : total: 512 used: 2
Remote-admin-user block retry-interval : 5 Min(s)
Remote-admin-user block retry-time : 3
Remote-admin-user block time : 5 Min(s)
Session timeout invalid enable : No
Which of the following statements is false?
- A. A maximum of 512 local users can be created. Two local users have been created.
- B. The domain name delimiter is at sign (@).
- C. The maximum number of consecutive authentication failures of the local account is 3.
- D. The local account lockout duration is 30 minutes.
Answer: D
Explanation:
The false statement is B. From the AAA configuration output, the value of Remote-admin-user block time is clearly shown as 5 Min(s), which means the account lockout duration is 5 minutes, not 30 minutes.
NEW QUESTION # 27
Which of the following are valid static route configurations?
- A. ip route-static 10.0.0.2 16 129.1.0.0
- B. ip route-static 129.1.0.0 16 serial 0/0/0
- C. ip route-static 129.1.0.0 255.255.0.0 10.0.0.2
- D. ip route-static 129.1.0.0 16 10.0.0.2
Answer: B,C,D
Explanation:
Option A is valid; the destination is defined in CIDR format (129.1.0.0/16) with a specified outgoing interface.
Option B is valid; it uses a subnet mask format and specifies a next-hop IP.
Option D is also valid with the destination and mask defined and a next-hop IP.
NEW QUESTION # 28
Which of the following statements is true about link aggregation in manual load balancing mode?
- A. In manual load balancing mode, all active interfaces forward data and load balance traffic.
- B. In manual load balancing mode, devices at both ends of a link send LACPDUs to each other.
- C. A maximum of four active interfaces can be configured in manual load balancing mode.
- D. The number of active interfaces can be set in manual load balancing mode.
Answer: A
Explanation:
In manual load balancing mode, all active interfaces forward traffic, distributing it evenly across links without LACP. This allows for static load balancing. Option B is incorrect because LACP (Link Aggregation Control Protocol) is not involved in manual mode.
NEW QUESTION # 29
What is the broadcast address of the network that contains a host with IP address
192.168.1.147/28?
- A. 192.168.1.255
- B. 192.168.1.145
- C. 192.168.1.159
- D. 192.168.1.157
Answer: C
Explanation:
A /28 subnet mask corresponds to 255.255.255.240, which means each subnet contains 16 IP addresses. The subnet boundaries in the last octet increase in steps of 16: 0, 16, 32, 48, 64, 80,
96, 112, 128, 144, 160, and so on. The host address 192.168.1.147 falls within the subnet range
192.168.1.144 to 192.168.1.159.
In that subnet, the network address is 192.168.1.144, the usable host range is 192.168.1.145 through 192.168.1.158, and the broadcast address is 192.168.1.159. Therefore, option C is correct. Option D is the first usable host address, not the broadcast address.
NEW QUESTION # 30
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