Since 2001, CAT5e (Category 5 enhanced) has been the Ethernet cable of choice. Operations have specified CAT5e for reliable network and industrial automation performance. After decades of using CAT5e, why would you change specifications? Ethernet cable standards have evolved and with advancing technology, the need for more bandwidth, faster speeds, and the ability to be compatible with CAT5e, improved Ethernet cables have been created. New options include CAT6, CAT6A, CAT7 or CAT7A Ethernet cables.