Which statement is true regarding collision domains in networking?

The statement that a switch can be said to segment collision domains is true because a switch operates at the data link layer (Layer 2) of the OSI model and is designed to intelligently forward packets to specific devices based on their MAC addresses. This functionality allows switches to create separate collision domains for each of their ports, enabling multiple conversations to occur simultaneously without collisions. Each port on a switch effectively creates its own collision domain, isolating traffic and thereby enhancing overall network performance and efficiency.

In contrast, devices like hubs do not segment collision domains; they create a single collision domain for all connected devices, leading to potential traffic collisions. Additionally, while routers do manage different networks and can interact with collision domains, they do not expand them; instead, they separate collision domains at a higher level (Layer 3) by routing between different subnets. Thus, the correct understanding is that switches provide a means to segment collision domains, promoting more effective data transmission within a network.