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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

CSMA-CA

Choose difficulty:

Beginner

Intermediate

Advanced

Which technique does CSMA/CA use to avoid collisions?

a: Carrier Sense and Random Backoff Explanation

Explanation

b: Collision Detection Explanation

Explanation

c: Synchronous Time Slots Explanation

Explanation

d: Token Passing Explanation

Explanation

Why does CSMA/CA use an acknowledgment (ACK) mechanism?

a: To confirm successful data transmission and avoid retransmission Explanation

Explanation

b: To detect collisions like CSMA/CD Explanation

Explanation

c: To allow multiple users to transmit at the same time Explanation

Explanation

d: To increase transmission speed Explanation

Explanation

What is the primary reason CSMA/CA is used in wireless networks instead of CSMA/CD?

a: Wireless networks cannot detect collisions efficiently Explanation

Explanation

b: Wireless networks have higher transmission speeds Explanation

Explanation

c: CSMA/CD is more expensive Explanation

Explanation

d: Wireless networks do not experience collisions Explanation

Explanation

What is the purpose of the RTS/CTS mechanism in CSMA/CA?

a: To reduce the hidden node problem Explanation

Explanation

b: To increase data transmission speed Explanation

Explanation

c: To eliminate all collisions Explanation

Explanation

d: To detect errors in received packets Explanation

Explanation

What happens when multiple devices sense an idle channel in CSMA/CA?

a: All devices transmit immediately Explanation

Explanation

b: Devices use a random backoff timer before transmitting Explanation

Explanation

c: The first device to transmit gains control of the channel Explanation

Explanation

d: All devices enter a collision state Explanation

Explanation

Why is CSMA/CA preferred in Wi-Fi networks?

a: Because Wi-Fi signals are prone to interference and hidden nodes Explanation

Explanation

b: Because CSMA/CD is faster Explanation

Explanation

c: Because Wi-Fi devices do not need to sense the channel Explanation

Explanation

d: Because CSMA/CA guarantees zero packet loss Explanation

Explanation

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