Oct-2026 Free H12-811_V1.0 Test Questions Real Practice Test Questions
H12-811_V1.0 Dumps Updated Oct 09, 2026 WIith 394 Questions
Huawei H12-811_V1.0 (HCIA-Datacom V1.0) Exam is a certification exam designed for individuals who want to become certified data communication professionals. H12-811_V1.0 exam validates the knowledge and skills of candidates in areas such as networking technologies, protocols, and devices used in data communication. HCIA-Datacom V1.0 certification is ideal for those who want to start a career in data communication or want to enhance their skills in this field.
Huawei H12-811_V1.0 certification exam is based on the latest industry standards and best practices. H12-811_V1.0 exam is designed to assess the candidate's ability to design, implement, and manage data communication networks. HCIA-Datacom V1.0 certification exam is divided into two parts: a written exam and a hands-on lab exam. The written exam tests the candidate's theoretical knowledge of data communication while the hands-on lab exam assesses the candidate's practical skills in designing and implementing data communication networks.
NEW QUESTION # 138
When the header length of an IPv4 data packet is 20B and the total packet length is 1500B, what is the valid payload of the packet?
- A. 20B
- B. 1520B
- C. 1500B
- D. 1480B
Answer: D
Explanation:
An IPv4 packet consists of a header and a payload:
Total Length=Header Length+Payload Length\text{Total Length} = \text{Header Length} + \text{Payload Length}Total Length=Header Length+Payload Length
* Given:
* IPv4 header length = 20B
* Total packet length = 1500B
Payload=1500B#20B=1480B\text{Payload} = 1500B - 20B = 1480BPayload=1500B#20B=1480B
* Option A (Incorrect): 1520B is incorrect because it exceeds the total packet length.
* Option B (Incorrect): 20B is just the header, not the payload.
* Option C (Incorrect): 1500B includes the header, not just the payload.
* Option D (Correct): 1480B is the correct payload size.
Thus, the correct answer is D (1480B).
Reference:Huawei HCIA-Datacom Official Documentation - IPv4 Packet Structure
NEW QUESTION # 139
On the broadcast network, both DR and BDR use the multicast address 224.0.0.6 to receive link state update messages.
- A. False
- B. True
Answer: A
NEW QUESTION # 140
Which of the following operations are mandatory to restore the factory default settings of an AR2200 router?
- A. Resetting saved configurations
- B. Specifying the configuration file for the next startup
- C. Clearing the current configuration
- D. Restarting the AR2200 router
Answer: A,C
Explanation:
Detailed Explanation: Restoring factory defaults on an AR2200 router requires both clearing the current configuration and resetting saved configurations. These steps ensure that any custom settings are removed, reverting the router to its original state. Simply restarting or specifying a startup file without clearing configurations would not remove custom settings.
NEW QUESTION # 141
As shown in the figure, which of the following ports will be in blocking state?
- A. G0/0/2 of SWC
- B. G0/0/1 of SWC
- C. G0/0/3 of SWB
- D. G0/0/3 of SWA
Answer: C
Explanation:
Detailed Explanation:In a Spanning Tree Protocol (STP) environment, the root bridge is selected based on the bridge ID. Here, SWA has the lowest bridge ID (4096:0001-0203-04AA), making it the root bridge. For each network segment, STP elects one designated port to forward traffic, and all other ports in that segment will be blocked to prevent loops.
Following the STP rules:
* SWA is the root bridge, so all of its ports (G0/0/2 and G0/0/3) will be designated ports.
* Each non-root switch (SWB and SWC) selects one root port, which is the port with the lowest path cost to the root bridge (SWA).
* SWB's G0/0/3 will have a higher path cost when compared with G0/0/1 (if assuming equal link costs), thus making G0/0/1 the root port on SWB.
* SWB will then block its G0/0/3 port to prevent a loop, as SWA's G0/0/3 is already the designated port for that link.
Hence, G0/0/3 of SWB will be in the blocking state to maintain a loop-free topology
NEW QUESTION # 142
In the wLAN network architecture, terminal devices that support the 802.11 standard are called? ()
- A. AP
- B. Client
- C. STA
- D. AC
Answer: A
NEW QUESTION # 143
If the broadcast address of a network is 172.16.1.255, what might its network address be? ()
- A. 172.16.1.253
- B. 172.16.2.0
- C. 172.16.1.128
- D. 172.16.1.1
Answer: C
NEW QUESTION # 144
The following figure shows the display interface Eth-Trunk 1 command output on a switch. Which of the following commands can be used to delete Eth-Trunk 1?
- A. inte GigabitEthernet 0/0/2 undo eth-trunk quit undo interface Eth-Trunk 1
- B. inte GigabitEthernet 0/0/1 undo eth-trunk quit undo interface Eth-Trunk 1
- C. undo interface Eth-Trunk 1
- D. inte GigabitEthernet 0/0/1 undo eth-trunk quit inte GigabitEthernet 0/0/2 undo eth-trunk quit undo interface Eth-Trunk 1
Answer: C
Explanation:
Comprehensive Explanation: To remove the Eth-Trunk interface, you can simply use the undo interface Eth- Trunk 1 command. This command deletes the entire Eth-Trunk interface from the switch configuration. The other commands involve additional steps to unbind physical interfaces from the Eth-Trunk, but these steps are unnecessary if you are deleting the Eth-Trunk interface entirely.
NEW QUESTION # 145
What does the command port trunk allow-pass vlan all do?
- A. All VLAN data frames are allowed to pass on this port
- B. The opposite port connected to the port must be configured with port trunk permit vlan all at the same time
- C. The connected peer device can dynamically determine which VLAN IDs are allowed to pass
- D. If the port default vlan 3 command is configured for the connected remote device, the VLAN 3 between the two devices cannot communicate
Answer: A
NEW QUESTION # 146
As shown in the figure, the network administrator creates VLAN2 on SWA and SWB. The ports connecting the hosts on the two switches are configured as Access ports. They are assigned to VLAN2. G0/0/1 of SWA and G0/0/2 of SWB are configured as Trunki ports. All VLANs are allowed to pass. What is needed to achieve normal communication between two hosts? () (Single-choice question)
- A. C. Just create BLAN2 on SWC
- B. Configure G0/0/1 on SWC as a teunk port and allow VLAN2 to pass through
- C. Create VLAN2 on SWC, configure G0/0/1 and G0/0/2 as trunk ports, and allow VLAN2 to pass
- D. Configure G0/0/1 on SWC as a trunk port and allow VLAN2 to pass. Set G0/0/2 as an access port.
PVID is 2.
Answer: C
NEW QUESTION # 147
In the MAC address table of the switch, which of the following entries will not age?
- A. Port MAC address table entry
- B. Device MAC address table entry
- C. Static MAC address table entry
- D. Dynamic MAC address table entry
Answer: C
NEW QUESTION # 148
A router that runs OSPF can enter the Full state only after Link-State Database (LSDB) synchronization is completed.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
* The Full state in OSPF means that all routers have completed LSDB synchronization and formed an adjacency.
* If LSDB synchronization is incomplete, the router remains in Loading or Exchange state.
* Only after the Database Description (DD) packets, Link-State Requests (LSR), and Link-State Updates (LSU) are exchanged, the router enters the Full state.
Thus, the correct answer is A (TRUE).
NEW QUESTION # 149
According to the command shown in the figure, which of the following descriptions is correct:
- A. The PVID of GigabitEthernet0/0/2 port is 10
- B. The PVID of GigabitEthernet0/0/1 port is 1
- C. The PVID of GigabitEthernet0/0/2 port is 1
- D. The PVID of GigabitEthernet0/0/1 is 10
Answer: C,D
NEW QUESTION # 150
If a windows host is started for the first time, if it uses DHCP to obtain an IP address, what is the source IP address of the first packet sent by this host? ()
- A. D. 127.0.0.1
- B. 0.0.0.0
- C. B. 169.254.2.33
- D. C. 255.255.255.255
Answer: B
NEW QUESTION # 151
By default, it takes at least 30 seconds for an STP-enabled port to transition from Disabled to Forwarding.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 152
As shown in the broadcast network. 0SPF runs on four routers. And in the same area. Same network segment.
OSPF will automatically elect one DR and multiple BDRs to achieve a better backup effect. ()(True or False)
- A. False
- B. True
Answer: A
NEW QUESTION # 153
Assuming that OSPF has been enabled on all routers in the following figure, which router is the BDR on this network?
- A. Router A
- B. Router D
- C. Router C
- D. Router B
Answer: B
Explanation:
In OSPF, the Backup Designated Router (BDR) is selected based on the highest priority and, in case of a tie, the highest router ID. Given that Router D has the appropriate settings, it is designated as the BDR, providing backup for the DR (Designated Router) in this network configuration.
NEW QUESTION # 154
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