H12-811_V1.0 Exam Questions Tutorials

Switch Forwarding Behavior:

If the destination MAC is not found in the MAC address table, the switch floods the frame.

Broadcasting Within VLANs:

VLAN tagging ensures the frame remains within its designated VLAN.

The frame is not sent to all interfaces but only within the VLAN.

Why Other Options Are Incorrect:

A: Does not consider VLAN segmentation.

C: Switches do not discard unknown unicast frames unless configured to do so.

D: Includes access interfaces only, but flooding happens on all VLAN interfaces.

Conclusion:

The switch floods the frame within the VLAN, making the correct answer B.

References: HCIA-Datacom V1.0 Certification Guide, Chapter 4: Switch Forwarding Mechanisms.

1. Understanding the ACL Rule

The rule:

rule 5 deny source 100.0.12.0 0.0.0.255

Blocks traffic originating from 100.0.12.0/24 (Host B’s network).

This means any packet sent from Host B to Host A will be blocked.

2. Applying the ACL to the Correct Interfaces

Option A: Applied inbound on GE0/0/1 → Blocks packets from Host B before reaching Host A. ✅

Option B: Applied inbound on GE0/0/2 → Blocks packets from Host A before reaching Host B. ✅

3. Why Other Options Are Incorrect

Option C (GigabitEthernet0/0/3):

Interface GE0/0/3 is not connected to Host A or Host B, so applying ACL here is meaningless.

Option D (Outbound on GE0/0/1):

Outbound filtering is less efficient than inbound filtering because it blocks traffic after routing.

4. Correct Approach to Prevent Communication

To completely block communication between Host A and Host B, we must:✅ Block inbound traffic on GE0/0/1 (Host A’s interface)✅ Block inbound traffic on GE0/0/2 (Host B’s interface)

Conclusion:

The correct choices are A and B because they block inbound traffic at the correct interfaces.

Options C and D are incorrect because they apply ACL rules to the wrong interfaces or use inefficient filtering.

References:✅ HCIA-Datacom V1.0 Certification Guide, Chapter 5: ACL Configuration

Disabling STP on a network with redundant paths between switches leads to a Layer 2 loop, which can cause broadcast storms and network congestion. STP is essential for preventing such loops by blocking redundant paths until needed for redundancy, ensuring network stability​.

Detailed Explanation:In Huawei VRP, the command-privilege command is used to modify the privilege level of a specific command. In this case, the command adjusts the privilege level of the save command within the user view to level 3, which is higher than the default level. This command does not modify the user's privilege level itself but changes the required privilege level to use the save command in the user view .