Remote Access Devices: How to Stay Protected

[@AhmedAhmed-gl4mg]

Hello sir, can you answer my questions? A Modbus master sends a request to a slave to read several registers. The slave responds with the following Modbus message: "040302025874DE". 1. What is the Modbus function code used in the request from the master to read several registers of The slave? 2. What is the address of the first register to read in the master query? 3. How many registers to read in the master query? 4. Complete the following table to decode the Modbus message sent by the slave by answering the question What is the request sent by the Modbus master to read the slave registers from the address of departure 00 64