JN0-102 Question #285: Real Exam Question with Answer & Explanation

Question

Options

• AIf a router is used, the collision domain includes all devices connected to the router.
• BIf a hub is used, the collision domain is limited to each device and the hub.
• CIf a switch is used, the collision domain is limited to each device and the switch.
• DIf a bridge is used, the collision domain includes all devices connected to the bridge.

Explanation

A switch effectively segments a network, creating a separate collision domain for each connected device, while devices like hubs or bridges might operate differently.

Common mistakes.

• A. A router separates broadcast domains and also collision domains at each of its interfaces, rather than including all connected devices in a single collision domain.
• B. A hub connects all devices to a single shared medium, placing all of them within one large collision domain, not limiting it to each device and the hub.
• D. A bridge, like a switch, segments collision domains by forwarding frames based on MAC addresses, thereby creating separate collision domains on each of its ports rather than combining them.

Concept tested. Ethernet collision domains and network devices

Reference. https://www.cisco.com/c/en/us/support/docs/lan-switching/ethernet/10570-41.html

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