Cisco is a five-letter word that is a big name in computer networks. It is a multinational technology conglomerate that designs, manufactures, and sells networking hardware, telecommunications equipment, and other high-technology services and products. Cisco is one of the largest networking companies in the world and has been a leader in the development of Internet Protocol-based networking technologies since 1984. Its products are used in many industries, including government, education, healthcare, and finance.