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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIA-Datacom V2.0 |
| Exam Number: | H12-811_V2.0-ENU |
| Exam Duration: | 90 minutes |
| Available Languages: | English, Chinese |
| Exam Price: | $200 USD |
| Related Certifications: | HCIA-Datacom |
| Exam Format: | Multiple-choice, Simulation, Multiple-response, Drag-and-drop |
| Passing Score: | 600/1000 |
| Real Exam Qty: | 60 |
| 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 # 116
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: C
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 # 117
The network administrator performs the configuration shown in the figure on SW1 and SW2. Which of the following statements are false about this scenario?
Answer: A,B,C
Explanation:
The exhibit shows GE1/0/2 as an access port in VLAN 3 on both switches, so PC2 and PC4 belong to the same Layer 2 broadcast domain. The inter-switch GE1/0/3 link is a trunk that permits VLANs 2 and 3, allowing VLAN 3 frames to pass between SW1 and SW2. Therefore, PC2 and PC4 can communicate at Layer
2, making statement B true. GE1/0/1 remains an access interface in the default VLAN 1 because no other default VLAN is configured. VLAN 1 is not permitted across the shown trunk, so PC1 cannot communicate with PC3 across the switches. PC1 and PC2 are also in different VLANs locally, and PC2 and PC3 are in different VLANs. Devices in different VLANs cannot exchange Layer 2 traffic directly; a Layer 3 gateway is required for inter-VLAN communication. Accordingly, statements A, C, and D are the false statements, which makes A, C, and D the correct selections.
NEW QUESTION # 118
On an STP network, an administrator wants SW2 to be elected as the root bridge. Which of the following methods can be used to achieve this goal?
Answer: C
Explanation:
In STP, the root bridge is elected based on the lowest bridge ID (BID). A BID is composed of the bridge priority and the MAC address of the switch. The device with the smallest BID becomes the root bridge.
Therefore, if an administrator wants SW2 to become the root bridge, the most direct and correct method is to configure a lower system priority on SW2, making option C correct.
Option A is incorrect because port priority affects port-role selection in some tie-breaking scenarios, but it does not determine root-bridge election. Option B is the opposite of what is required, because a higher system priority makes the BID larger and reduces the chance of being elected as root. Option D is also incorrect because root path cost is used by non-root bridges to select the best path to the existing root bridge; it does not determine which switch becomes the root bridge in the first place. HCIA-Datacom stresses that bridge priority tuning is the standard administrative method used to control root bridge placement in campus networks for stable and predictable Layer 2 topology design.
NEW QUESTION # 119
After the root bridge is elected on an STP network, which of the following parameters may be compared by ports on non-root bridge nodes to elect the root port? (Select all that apply)
Answer: A,B,C,D
Explanation:
On a non-root bridge, the root port is the port that receives the best BPDU toward the root bridge.
STP selects the root port by comparing several parameters in order. The first important parameter is the root path cost (RPC), so option B is correct. If multiple ports have the same RPC, the switch then compares the bridge ID (BID) of the upstream device sending the BPDU, making option C correct. If those are still equal, the switch compares the port ID (PID) of the upstream sending port, so option D is also correct.
If all of those values remain identical from the switch's perspective, the device can finally compare the local port ID to determine which local interface becomes the root port, so option A is also correct. HCIA-Datacom teaches this comparison logic as part of STP election rules. The process ensures deterministic selection of a single root port on every non-root switch.
Understanding the comparison sequence is essential for predicting STP topology behavior and for influencing port roles through path cost tuning or bridge-priority adjustments during campus network design and troubleshooting.
NEW QUESTION # 120
If host A wants to communicate with host B, which is on another subnet, host A broadcasts an ARP request to obtain host B ' s MAC address. After receiving the request, host B replies with an ARP response to notify host A of its MAC address.
Answer: A
Explanation:
ARP resolves an IPv4 address to a Layer 2 MAC address only within the local broadcast domain. When Host A determines, from its IP address and subnet mask, that Host B is on a different subnet, Host A does not broadcast an ARP request for Host B ' s MAC address. Instead, it forwards the packet to its default gateway.
If the gateway ' s MAC address is not already cached, Host A broadcasts an ARP request for the gateway interface ' s IPv4 address. The gateway replies with its own MAC address, and Host A uses that MAC address as the Ethernet destination while retaining Host B ' s IP address as the IP destination. The router then forwards the packet toward Host B and may perform ARP on the destination subnet to learn Host B ' s MAC address.
Therefore, the statement incorrectly describes cross-subnet forwarding as direct ARP resolution between the two hosts. The correct answer is FALSE, option B.
NEW QUESTION # 121
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