Unicast

In computer networks, unicast is the sending of information packets to a single destination. "Unicast" is derived from the word broadcast, as unicast is the extreme opposite of broadcasting. In computer networking, multicasting is used to regain some of the efficiencies of broadcasting.These terms are also synonymous with streaming content providers' services. Unicast servers provide a stream to a single user at a time, while multicast servers can support a larger audience by serving content simultaneously to multiple users.Unicast is also the name of a Rich Media Company which was acquired by Viewpoint Corporation in 2003.
See more at Wikipedia.org...