H12-821_V1.0 Exam Dumps : HCIP-Datacom-Core Technology V1.0

ARP spoofing is a Layer 2 attack, as it targets ARP tables in switches or end devices. All other attacks, including IP spoofing, ICMP attacks, and Smurf attacks, are network layer (Layer 3) attacks ​.

The defaultSTP priorityon Huawei switches (and in the IEEE standard) is32768.

Lower priority values increase the likelihood of a switch becoming the root bridge. You can configure this value in increments of 4096.

Reference from Huawei HCIP-Datacom-Core Technology Study Guide:

“The default bridge priority of Huawei switches is 32768. The root bridge is elected based on the lowest bridge ID, which consists of the priority and MAC address.”

(Chapter: Spanning Tree Protocols – Section: RSTP and Bridge Election)

Understanding the Network Setup:

The OSPF network consists of three areas (Area 1, Area 0, and Area 2).

The server's subnet192.168.1.0/24is directly connected to R1 and imported into OSPF using the command:

import-route direct type 1 cost 2

Thetype 1specifies the route as anOSPF Type 1 external route, meaning both the external cost and the internal OSPF cost will be included when calculating the total cost.

The external cost specified for the imported route is2.

Cost Calculation to R2:

The interfaces between the routers are GE interfaces, and the default cost for GE interfaces is1.

The path from R2 to the server goes through the following hops:

R2 → R1:Cost = 1 (intra-area link).

R1 → Server:External cost = 2 (specified in theimport-routecommand).

Total cost to R2:

Intra-area cost (1) + External cost (2) = 3

Verification of Each Option:

Option A (2):Incorrect. This only accounts for the external cost, ignoring the internal OSPF cost.

Option B (4):Incorrect. This overestimates the cost by adding an extra hop.

Option C (3):Correct. The total cost is3(1 for the intra-area link + 2 for the external cost).

Option D (1):Incorrect. This ignores the external cost of the imported route.