Cellular digital packet data
Define Cellular digital packet data?
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Cellular Digital Packet Data (or CDPD) was a wide-region mobile data service that employed unused bandwidth normally employed by AMPS mobile phones among 800 and 900 MHz to transfer data. Speeds upto 19.2 kbit/s were possible. The service was stopped in conjunction with the retirement of the parent AMPS service; this has been functionally substituted by faster services like EV-DO, 1xRTT, and UMTS/HSPA.
User Datagram Protocol: The unreliable and connectionless transport protocol is known as User Datagram Protocol. This is a lower version of TCP that is why it consists far less latency rate than TCP and UDP does not give Flow control, sequencing and a
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