Interrupt Transfer Mode – It is used for periodic transfer of the data - for example, a mouse or keyboard.There is no assurance of the delivery of the data and it also does not conduct the handshake phase. Isochronous Transfer Mode – This mode is considered as the best effort mode as it uses packets with at most 1024 bytes of size.In this transfer, the data is protected with the help of error-detecting codes. Bulk Transfer Mode – It is used for delivering the huge quantities of data and implements three phases: token packet, the data packet and at last handshake packet.Control Transfer – The function of the control transfer is to configure devices and read the status information.There are four types of data transfer mode for USB that are control transfer, bulk data transfer, isochronous transfer, and interrupt data transfer. The maximum length of the cable can go up to 5 meters. Each USB end has either of the two connector types, one for the upstream communication and the other is for the downstream. The USB can be powered by itself, or a hub, host. Two wires are intended to transmit and receive data, and the rest two are used for power and ground. There are four-wire cable interface used for USB. These can be used in small portable devices, like smartphones, digital cameras, GPS devices and more. Micro – USB 2.0 (Micro-A, Micro-B and Micro-AB) plug and receptacle – Micro-USB connectors conveys both power and data.B plug and receptacle – Standard-B USB usually plugs into a bigger device like a printer.A plug and receptacle – Standard-A USB plug is injected into a USB host or a hub and transfer both power and data.It was backward compatible with the USB 1.x series. However, practically the effective calculated throughput can be approximately 280 Mbps. USB 2.0 can deliver the maximum transfer speed of 480 Mbps. It is a successor of USB 1.1 and provides more functionalities and speed as compared to USB 1.1.
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