On which connection type are collisions more likely to happen?

Collisions occur when two or more devices attempt to transmit on a shared communication medium at the same time. Wi-Fi is inherently a shared medium, as all devices within a Basic Service Set (BSS) share the same radio frequency channel. It uses a protocol called Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) specifically to minimize, but not eliminate, the probability of collisions. In contrast, modern wired connections are typically switched and full-duplex, providing dedicated bandwidth and eliminating collisions entirely.

A. Dark Fiber is a dedicated, point-to-point optical link with no other devices sharing the medium, making collisions impossible.

B. Modern fiber optic networks use switching and full-duplex communication, where data can be sent and received simultaneously, thus preventing collisions.

C. Modern networks using copper cabling employ switches that create dedicated, full-duplex connections between devices, eliminating the collision domains found in older hub-based networks.

- Kurose, J. F., & Ross, K. W. (2021). Computer Networking: A Top-Down Approach (8th ed.). Pearson. In Chapter 7, Section 7.2, the text explains that Wi-Fi is a broadcast channel and details the use of CSMA/CA to deal with the multiple access problem and avoid collisions.

- Tanenbaum, A. S., & Wetherall, D. J. (2011). Computer Networks (5th ed.). Prentice Hall. Chapter 4, Section 4.2.2, describes collision-free protocols and contrasts them with contention-based systems like classic Ethernet and Wi-Fi, where collisions are a fundamental issue to be managed.