Free Practice Questions for Huawei H12-811_V1.0 Exam

Comprehensive Explanation: The Transport layer (Layer 4) in the OSI model is responsible for end-to-end error checking, flow control, and reliable data transmission. It ensures that data is properly sequenced, without errors, and flow-controlled between the sender and receiver. Protocols such as TCP (Transmission Control Protocol) operate at this layer, providing mechanisms for retransmitting lost packets and maintaining the reliability of a session​​​

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.

Detailed 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. (Reference: HCIA-Datacom Training Material, STP and RSTP Compatibility)

Comprehensive and Detailed In-Depth Explanation:

Static routes are manually configured routes that do not change unless manually updated.

Correct Statements:

(A) Static routes are manually configured by network administrators.

(B) They do not automatically adapt to network topology changes.

(D) They have low system performance requirements because no additional processing (like dynamic routing protocols) is needed.

Incorrect Statement:

(C) " Routers need to exchange routing information through the static routes " is false because static routes do not involve any exchange of routing information. Unlike dynamic routing protocols (such as OSPF or BGP), static routing does not require routers to share route information.

Comprehensive Explanation: It is possible for the load balancing modes at both ends of an Eth-Trunk (Ethernet Trunk) to be different, as long as the devices at both ends support the different modes. Load balancing modes control how traffic is distributed across multiple links in the trunk. Although the modes may differ, they must be compatible in terms of ensuring that traffic is appropriately handled across the multiple physical interfaces bundled in the trunk.

Comprehensive and Detailed Explanation:

Huawei controllers support open APIs for network programmability:✅ RESTful → Web-based API using HTTP methods.✅ OpenFlow → SDN protocol for control/data plane separation.✅ NETCONF → XML-based network configuration protocol.

❌ Incorrect Option:

AAA (Authentication, Authorization, and Accounting) is a security mechanism, NOT an open API.

✅ Reference: HCIA-Datacom SDN Guide – Open API Support

Statement A (False): Any router can function as an ASBR, not just ABRs. An ASBR is any router that connects OSPF to an external network, regardless of area.

Statement B (True): Area 0 is the OSPF backbone area, and all other areas must connect to it.

Statement C (True): Area partitioning reduces LSDB size by limiting the scope of LSAs within an area.

Statement D (True): Routers in the same area have the same LSDB, ensuring consistency in link-state information.

Thus, the correct answer is A (False statement).

A " Length/Type " field value of 0x0806 indicates an ARP (Address Resolution Protocol) frame, which is part of the Ethernet II frame standard. The source MAC address cannot be a broadcast address (FFFF-FFFF-FFFF), as ARP requests are sent from specific hosts. This field helps identify the protocol type used by the Ethernet frame​.