USSD (Unstructured Supplementary Service Data) is a protocol used for transmitting data over a cellular network. It is commonly used for interactive services, such as mobile banking and interactive voice response (IVR) systems.
USSD is based on a session-based model, in which a user initiates a session by sending a request to the USSD server. The server responds with a message, and the user can then send additional requests and receive responses within the context of the session. When the user is finished, they can terminate the session.
USSD is often used for services that require real-time interaction, such as mobile banking. To use a USSD-based service, a user typically needs to dial a specific USSD code on their mobile phone, which initiates a session with the USSD server. The user can then enter commands and receive responses from the server.
USSD is a fast and efficient way to transmit data over a cellular network, and it is widely used for interactive services. It is particularly useful in areas where internet connectivity is limited or unreliable, as it does not require an internet connection to work.
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