Support for older protocols that might still appear in specialized environments or older exam versions. How to Use the Image To get started with this image in your simulator:
Verify that your router has sufficient flash memory and RAM to support this IOS image. C3725-adventerprisek9-mz.124-15.t14.bin Download-
Last updated: October 2025
The only legal and official source for Cisco IOS software is the Cisco Software Central Access Requirements : You must have a valid Cisco Connection Online (CCO) Support for older protocols that might still appear
Cisco periodically announces end-of-life and end-of-support dates for their products and software versions. As of my last update, Cisco has announced end-of-life and end-of-support for Cisco IOS 12.4(15)T, which might affect your ability to get technical support or bug fixes. C3725-adventerprisek9-mz.124-15.t14.bin Download-