Samsung has been shipping full IP control models including Power On support since the 2016 models. Models prior to 2016 did not support Power On via network control. For information on whether your model supports full IP control, please consult Device Compatibility. For models that do not support full IP control, we recommend the use of a Simple Blaster for Serial control (first choice) or IR control.
For Samsung TVs that are not EX-Link enabled (typically old or low-end models), use IR control via a Simple Blaster. The Simple Blaster includes all cables necessary for IR control.