Students in a data networking class are reviewing materials in preparation for a quiz. Which statement describes the operation of an access control method for shared network media?

Question:
Students in a data networking class are reviewing materials in preparation for a quiz. Which statement describes the operation of an access control method for shared network media?

• The controlled-based access method, used on legacy bus-topology Ethernet LANs, decided the order of each device to transmit.
• In the CSMA/CD method, when two devices transmit at the same time, a collision is detected and data is resent immediately.
• The CSMA/CA method attempts to avoid collisions by having each device informing others how long the media will be unavailable.
• In a contention-based multiaccess network, each node has its own time to use the medium.

Explanation: CMSA/CA does not detect collisions but attempts to avoid them by waiting before transmitting. Each device that transmits includes the time duration that it needs for the transmission. All other wireless devices receive this information and know how long the medium will be unavailable.

Exam with this question: CCNA 200-301 Certification Practice Exam Answers