The correct answer is: B. Unicasting
Unicasting is a type of network communication in which data is sent from one source to one destination. This is the most common type of communication, and it is used for tasks such as sending email, browsing the web, and transferring files.
Multicasting is a type of network communication in which data is sent from one source to multiple destinations. This is used for tasks such as streaming video and audio, and for sending updates to multiple devices.
Hybrid multicasting is a type of network communication that combines unicasting and multicasting. This is used for tasks such as sending updates to a large number of devices, but only to those devices that are currently active.
Simulcasting is a type of network communication in which data is sent from one source to multiple destinations at the same time. This is used for tasks such as broadcasting live television and radio.
In a paging system, a central system (the paging controller) sends a page (a short message) to a specific mobile device (the pager). The pager then alerts the user that they have received a page. Paging systems typically use unicasting to send pages to individual pagers.
Unicasting is the most efficient type of communication for paging systems because it minimizes the amount of network bandwidth that is used. Additionally, unicasting ensures that the page is delivered to the intended recipient.