Final answer:
TDMA is efficient due to allocated time slots and the absence of collisions, but requires synchronization. CSMA/CA prevents collisions using carrier sensing and backoff mechanisms but results in lower efficiency due to the potential for channel contention and idle waiting times.
Step-by-step explanation:
Pros and Cons of TDMA vs. CSMA/CA
Time-Division Multiple Access (TDMA) and Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) are two different methods used in communication systems for multiple access. TDMA works by dividing the available bandwidth into time slots and assigning each slot to a user. This method is very efficient because it removes the possibility of collisions since each user transmits in their allocated time. However, it requires precise synchronization between the transmitting and receiving devices, which can be complex to implement.
On the other hand, CSMA/CA works by having each device check the channel for traffic (carrier sense) and then wait for a random backoff period if the channel is busy to avoid collisions (collision avoidance). While this method reduces the possibility of collisions, it is inherently less efficient than TDMA because devices may have to wait for an open channel, resulting in idle time and potential overhead due to backoff algorithms.
- A) TDMA is more efficient because of its organized structure but requires synchronization.
- B) CSMA/CA reduces collisions with its collision avoidance mechanism but at the cost of lower efficiency.
- C) TDMA is not prone to collisions, contrary to the statement, and it offers higher efficiency due to the dedicated time slots.
- D) CSMA/CA operates without needing time slots, which offers more flexibility but can lead to decreased efficiency as it contends with other devices for channel access.