Cisco Certified Network Associate (CCNA) The Cisco Certified Network Associate (CCNA) certification is the second level of Cisco's five-level career certification process. A CCNA certification certifies a technician's ability to install, set up, configure, troubleshoot and operate a medium-sized routed and switched computer network.
Freebase(0.00 / 0 votes)Rate this definition: Retraining. Vocational rehabilitation or retraining is the process of learning a new skill or trade, often in response to a change in the economic environment. Generally it reflects changes in profession rather than an upward movement in the same field.
A retarder is a device used to augment or replace some of the functions of primary friction-based braking systems, usually on heavy vehicles. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from running away by accelerating down the hill. They are not usually capable of bringing vehicles to a standstill, as their effectiveness diminishes as vehicle speed lowers.