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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIA-Datacom V2.0 |
| Exam Number: | H12-811_V2.0-ENU |
| Exam Duration: | 90 minutes |
| Passing Score: | 600/1000 |
| Available Languages: | English, Chinese |
| Related Certifications: | HCIA-Datacom |
| Real Exam Qty: | 60 |
| Exam Price: | $200 USD |
| Exam Format: | Multiple-response, Multiple-choice, Simulation, Drag-and-drop |
| Certificate Validity Period: | 3 years |
| Sample Questions: | Huawei H12-811_V2.0 Sample Questions |
| Exam Way: | Available at Pearson VUE test centers (offline) or online proctored exam. |
| Pre Condition: | No prerequisites required; candidates can register directly. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/cert/#/cert/Details/68381b0d8e534a6a9339761047279030 |
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NEW QUESTION # 32
Enterprise data center (DC) services are no longer carried by physical machines or provided only for internal users. Instead, cloud platforms integrate resources in a unified manner and provide services for external users. Continuous service innovation requires the DC construction mode to evolve from single-DC to multi-site multi-DC.
Answer: A
Explanation:
Modern enterprise data centers are no longer limited to physical machines or internal-only services. With cloud computing, resources are pooled and abstracted to provide services to both internal and external users. To support scalability, high availability, and continuous service innovation, data center architectures have evolved from single-site deployments to multi-site, multi-data center designs.
NEW QUESTION # 33
DAD enables a node to detect whether an IPv6 address is already in use by another node before assigning it to an interface. This ensures that duplicate unicast addresses do not exist on a network. Which of the following packets are used for DAD? (Select all that apply)
Answer: A,B
Explanation:
Duplicate Address Detection (DAD) is an IPv6 mechanism used to verify that a unicast address is not already in use before the address is assigned to an interface. DAD is implemented using Neighbor Solicitation (NS) and Neighbor Advertisement (NA) messages, which are part of the ICMPv6 Neighbor Discovery protocol. Therefore, options A and D are correct.
When a host wants to verify a tentative IPv6 address, it sends an NS message for that address. If another node on the link is already using that address, that node responds with an NA message, indicating the address is duplicated and cannot be assigned. If no NA is received within the required period, the host assumes the address is unique and can use it.
NEW QUESTION # 34
The figure shows the simplified topology of an enterprise campus network. On this network, the aging time of dynamic MAC address entries on switches is 300 seconds.
The administrator connects PC1 to GE1/0/1 of SW1 and successfully pings the IP address of PC2 from PC1.
Then, the administrator disconnects the Ethernet cable of PC1
from GE1/0/1 of SW1, immediately connects the cable to GE1/0/2 of SW1, and pings the IP address of PC2 from PC1. Which of the following operations does SW1 perform after receiving a data frame from PC1 when PC1 is connected to GE1/0/2 of SW1?
Answer: D
Explanation:
An Ethernet switch learns MAC address entries dynamically by examining the source MAC address of incoming frames. When SW1 first receives frames from PC1 on GE1/0/1, it creates a MAC address table entry mapping PC1's MAC address to that port. If PC1 later sends frames that arrive on GE1/0/2, SW1 updates the learned entry to reflect the new incoming interface. Therefore, option B is correct: SW1 saves the mapping between PC1's MAC address and GE1/0/2 and removes or overwrites the old mapping associated with GE1/0/1.
Option A is incorrect because a single dynamic MAC address is not normally maintained on two different ports within the same VLAN at the same time; that would cause forwarding ambiguity. Option C is incorrect because a normal move of one MAC address does not require clearing the entire MAC table. Option D is also incorrect because switches update MAC learning dynamically upon receiving new source traffic and do not have to wait for the previous entry to age out. HCIA-Datacom uses this principle to explain MAC address learning, migration, and troubleshooting of loops or host movement in switched Ethernet networks.
NEW QUESTION # 35
In the STP topology shown in the figure, all links have the same path cost, and SW1 is the root bridge. Which of the following ports will become designated ports? (Select all that apply)
Answer: A,C,D
Explanation:
In STP, the root bridge has all its active ports elected as designated ports on each connected segment. On non-root switches, one port is selected as the root port, and on each LAN segment, one designated port is elected based on the best BPDU. Since SW1 is the root bridge and all links have equal cost, the election depends first on the path cost to the root, then on bridge ID, and then on port ID if needed.
According to the topology, the ports that become designated are GE1/0/2 of SW2, GE1/0/1 of SW2, and GE1/0/3 of SW3, which correspond to option A, B, and C.
NEW QUESTION # 36
When a DHCPv4 client first joins a network, it broadcasts a DHCP DISCOVER message using 0.0.0.0 as the source IP address.
Answer: A
Explanation:
The statement is correct because a DHCPv4 client initially does not have a valid IPv4 address.
The HCIA-Datacom V2.0 Training Material describes the DHCP address allocation process, beginning with the Discovery stage.
During this stage, the client broadcasts a DHCP DISCOVER message to locate DHCP servers on the network.
Since the client has not yet obtained an IP address, it uses 0.0.0.0 as the source IP address and
255.255.255.255 as the destination IP address.
The limited broadcast destination allows devices within the local broadcast domain to receive the discovery message.
A DHCP server receiving the request can respond with a DHCP OFFER containing an available address and associated configuration information.
After the DHCP REQUEST and DHCP ACK exchange, the client can begin using its assigned IPv4 address.
Therefore, the statement is TRUE.
NEW QUESTION # 37
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