Realtek Ethernet Diagnostic Utility

Realtek Ethernet Diagnostic Utility is an official troubleshooting and maintenance tool for Realtek Ethernet adapters. It helps you quickly assess network health, identify hardware or cabling issues, and fine-tune adapter settings on supported Windows systems. Designed for both IT professionals and advanced users, it provides clear visibility into connection status and detailed adapter information.

Key capabilities:

• Monitors link status, speed, and duplex in real time
• Displays adapter details such as controller model, MAC address, and driver version
• Runs built-in diagnostics, including basic loopback and cable-related tests
• Generates logs and reports to aid in support and documentation
• Resets or reinitializes the adapter to resolve common connectivity issues
• Offers access to select advanced features for troubleshooting

By consolidating status monitoring and diagnostics in one place, the utility streamlines problem isolation—whether the cause is a faulty cable, configuration conflict, or driver mismatch. Note: Some tests may temporarily interrupt network connectivity, and features vary by adapter model and driver version.

Realtek Ethernet Diagnostic Utility is developed by Realtek and is used by 856 users of Software Informer. The names of program executable files are 8169Diag.exe, 8169DiagV2.exe and RtlUpd64.exe. This particular product is not fit to be reviewed by our informers.

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