Communication technologies. choose and justify the choice of a particular access control method for a given situation.

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D2 choose and justify the choice of a particular access control method for a given situation.

CSMA CA: a medium access control MAC protocol used in a bus network CSMA/CA requires a delay in network activity after completing a transmission. carries sense multiple access collusion avoidance is a network contention protocol that listens to a network allowing it to avoid any collusion unlike CSMA CD which only deals with network transmission only, if collusion appears CSMA CA comes in play by broadcasting the signals to the network, to listen for collusion and inform other devices not to broadcast any signal before any data can be transmitted.CSM/CA is more expensive to implement that CSMA/CD as it requires additional embedding on each device and it offers an improved access control which reduces collisions thereby improve performance of the network. CSMA/CA is half duplex in nature as wireless LANs are standardized in IEE 802.11 which uses positive acknowledgement ACK mechanism, which requires transmitting station, checking the medium to determine its availability sending a short request for transmitting RST packets containing the source and destination address and if available a response is sent to send the CTS packet. If an ACK packet is