Unicast is a networking technology that is used to deliver a single stream of data to a single recipient. Unicast uses a unique network address, such as an IP address, to identify the recipient, and sends a separate copy of the data to each recipient. Unicast is the most common type of data transmission used on the internet and other networks, and is used for most applications, such as web browsing, email, and file transfer. Unicast is simple and reliable, but can be less efficient than other technologies, such as multicast, when the data needs to be delivered to many recipients simultaneously. Unicast is supported by many networking technologies, including Ethernet, Wi-Fi, and cellular networks.