This exercise teaches you that media conversion is not magic. It is simply a Layer 1 (Physical) and Layer 2 (Data Link) pass-through. The "converter" ignores the packet contents; it just changes the physical signal from electrical (copper) to optical (fiber).
To configure a media converter in Cisco Packet Tracer, follow these steps: media converter in cisco packet tracer link
You can locate the Media Converter by following these steps: Network Devices category in the bottom-left menu. Select the sub-category. Look for the device labeled Media Converter (often listed as "PT-Empty-Media-Converter" or similar). How to Use a Media Converter This exercise teaches you that media conversion is not magic