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Which of the following statement is true?

  • A.A switch creates a single collision domain and a single broadcast domain. A router creates a single collision domain.
  • B.A switch creates separate collision domains but one broadcast domain. A router provides a separate broadcast domain.
  • C.A switch creates a single collision domain and separate broadcast domains. A router provides a separate broadcast domain as well.
  • D.A switch creates separate collision domains and separate broadcast domains. A router provides separate collision domains.

Answer: B

Correct answer: A switch creates separate collision domains but one broadcast domain. A router provides a separate broadcast domain.

Each switch port is its own collision domain, which is what removes contention, but a broadcast is flooded to every port, so the whole switch remains one broadcast domain. A router does not forward broadcasts, so each of its interfaces is a separate broadcast domain - which is why routing, or VLANs with routing between them, is what actually divides a large flat network.

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