Huawei Updated H12-811_V1.0 Exam Questions and Answers by saif

An ARP (Address Resolution Protocol) packet includes several fields essential for mapping IP addresses to MAC addresses. The fields include:

Source Protocol Address: Identifies the IP address of the requesting device.

Source Hardware Address: Contains the MAC address of the source.

Hardware Type: Indicates the hardware type, typically Ethernet.

Operation Code: Specifies the operation (request or reply). These fields collectively allow devices to resolve IP addresses to physical MAC addresses, enabling direct communication within the local network​.

The default Link Aggregation Control Protocol (LACP) system priority on Huawei switches is 32768. This priority helps determine which device takes the active role in link aggregation when multiple switches are involved. A lower value indicates a higher priority for managing the aggregated link​.

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

Given correct configuration, hosts within the same subnet should be able to communicate, so the host at 10.0.12.1 can ping the host at 10.0.12.2. This scenario assumes correct interconnectivity and absence of firewall or ACL rules that would block the communication​.