What method does the Bottom Up Approach use in troubleshooting?

The Bottom Up Approach in troubleshooting begins with the physical connection and progressively moves upward through the various layers of the system, such as the network and application layers, until the issue is resolved. This method is effective because it establishes a solid foundation by ensuring that the essential, underlying physical infrastructure is functioning correctly before moving on to higher-level components.

Starting with the physical connection allows troubleshooting to eliminate basic connectivity issues before analyzing more complex aspects of the system. By addressing the hardware first, such as cables, switches, and routers, one can often resolve issues that might be causing failures higher up in the stack. This approach is systematic and helps avoid overlooking fundamental problems that could be affecting applications and user experiences.