Cisco 100-105 Exam

On which type of device is every port in the same collision domain?

  • A. a router
  • B. a Layer 2 switch
  • C. switch
  • D. a hub
  • E. a Layer 3 switch
Answer: Option D.

The definition of a collision domain is a set of LAN devices whose frames could collide with one another. This happens with hubs, bridges, repeaters and wireless access points as only one device can send and receive. If more than one device tries sending or receiving, the information is lost and irrecoverable it will need to be resent. This can slow down network performance along with making it a security threat.

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