Due to which the risk of collision is very high in this aloha method. It’s a simple but elegant protocol, i.e., whenever the system has a data frame to send, it transmits the data frame continuously. Pure Aloha: Pure aloha is also called the original aloha protocol. In this method, any user can transmit the data at any time. Aloha was designed for the wireless local area network (WLAN), which is also known as the radio broadcast. AlohaĪLOHA is a Multiple Access Protocol which is used for random access in the network. When a collision is detected, CSMA/CD tells the station what to do. CSMA is later further divided into two parallel methods CSMA/CD and CSMA/CA. Random access protocol is divided into two categories firstly, aloha, and second CSMA (carrier sense multiple access). However, if more than one station attempts to transmit the data, there is an access conflict-collision, due to which the frames are either lost or changed. No anyone system can depend and control another system. In the Random access protocol, all systems are equal. The media access control protocol is divided into three protocols: The Random access, the Controlled-access, and the Channelization protocol. The Sub-layer of the data link layer is shown in the figure below. The lower sub-layer is responsible for multiple access resolution that is called media access control (MAC). The upper sub-layer is responsible for flow control and error control that is called the logical link control layer. Multiple Access Control: The data link layer is separated into two sub-layers.

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