Systems Security Certified Practitioner (SSCP) — Question 7

Which of the following mechanisms was created to overcome the problem of collisions that occur on wired networks when traffic is simultaneously transmitted from different nodes?

Answer options

• A. Carrier sense multiple access with collision avoidance (CSMA/CA)
• B. Carrier sense multiple access with collision detection (CSMA/CD)
• C. Polling
• D. Token-passing

Correct answer: D

Explanation

The correct answer is D, Token-passing, which allows nodes to take turns transmitting data, thus preventing collisions. Options A and B, CSMA/CA and CSMA/CD, are used in wireless and wired networks respectively but do not eliminate collisions; they manage them. Polling, option C, involves a central controller checking nodes for data, which is different from addressing collision issues directly.