OSI Model Simplified

OSI layer Mnemonic

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Application layer - aka layer 7 PDU Message Example: Browser ID= GUI

Presentation layer - aka layer 6 PDU Message Example ClientSide Scriting ID= Content-Type

Session layer -aka layer 5 PDU Message Example: Server-Side scripting ID=

Transport layer - aka Layer 4 PDU Datagram/Segment Example: TCP/UDP ID=Port

Network Layer - aka Layer 3: PDU Packet Example : Router ID= IP

Data/link layer - aka Layer 2: PDU Frame. Example Switch. ID=MAC

Physical Layer - aka Layer 1 : PDU bit. Example : Hub ID=Signal

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Flash Tool Error Codes -MTK Chipset

Complete List of SP Flash Tool Error Codes and their Meanings and Solutions MTK Chipset. . How to Fix SP Flash Tool Errors (BROM Error Codes): SP Flash Tool Failed to enumerate COM Port This error clearly means that the Flash Tool has issues finding the COM port on which your device is connected. Solution: Connect your watch to other Port and make sure you have USB Drivers installed. Open “Device Manager” and find the COM Port of the device you connected. Once found, open Flash Tool, click on Options -> COM Port -> Select the COM Port on which you have connected your device. Device automatically disconnects during flashing Meaning: Device disconnects as soon as the flashing process begins, interrupting the process. Solution: Try a different USB Cord, USB Port & PC Hold the Volume down or up button while connecting the device to PC for flashing SP Flash Tool remains at 0% Solution: Install necessary MediaTek VCOM drivers on PC. Use the latest version of S