Which device segments collision domains?

Which device segments collision domains?

• A. Switch
• B. Router
• C. Hub
• D. Bridge

Answer: (A)

Collision domains are the parts of a network where devices can collide when transmitting at the same time. A hub passes electrical signals to all ports, so every device attached to that hub shares a single collision domain. A switch, on the other hand, creates a separate collision domain for each port it has. That means devices connected to different switch ports don’t contend with each other; only the devices on the same port share a collision domain, which effectively eliminates collisions between devices on different ports. This per-port segmentation is what modern Ethernet networks rely on to improve performance. While bridges and routers also help isolate traffic in their own contexts, the clear, direct way a switch segments collision domains in a typical LAN setup is by providing a separate collision domain for each connected device on each port.

Collision domains are the parts of a network where devices can collide when transmitting at the same time. A hub passes electrical signals to all ports, so every device attached to that hub shares a single collision domain. A switch, on the other hand, creates a separate collision domain for each port it has. That means devices connected to different switch ports don’t contend with each other; only the devices on the same port share a collision domain, which effectively eliminates collisions between devices on different ports. This per-port segmentation is what modern Ethernet networks rely on to improve performance. While bridges and routers also help isolate traffic in their own contexts, the clear, direct way a switch segments collision domains in a typical LAN setup is by providing a separate collision domain for each connected device on each port.