Access methods

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Access methods
-       How data are go in and go out from cable
-       To make sure the data flow is correct

Two types of access method
-       CSMA
-       Token passing

CSMA (Carrier-sense multiple access)
Two types of CSMA
-CSMA/CD – with Collision Detection
-CSMA/CA – with Collision avoidance

CSMA/CD
-       All devices in the network listen to the network, if there is no one is using they send message
-       To detect and senses
-       If someone is sending a message , you need to wait to avoid collision
-       Listen first the cable if someone is using the cable

CSMA/CA
-       Take queue and orderly
-       All the devices need to inform the network if they want to send a message

Token passing
-       Usually use ring topology
-       when the token is free, than someone can send the message

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