What is a characteristic of CSMA/CA that differs from CSMA/CD?
- CSMA/CA is suitable for networks with token ring topology.
- An end device sends a notification across the media before it sends a data frame.
- No collisions can exist within a local CSMA/CA network.
- CSMA/CA is a deterministic access method that controls use of the network.
Explanation: Both CSMA/CD and CSMA/CA are contention-based access control methods. With CSMA/CD, each end device monitors the media for the presence of a data signal. If the media is free, the device transmits data. With CSMA/CA, each end device also examines the media for the presence of a data signal. If the media is free, the device sends a notification across the media of its intent to use it. The device then sends data. With this method, CSMA/CA avoids possible collisions but does not completely stop them.
Exam with this question: Module 2.3.3 Data Link Layer Quiz
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