Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

• the virtually unlimited availability of IPv6 addresses
• the use of CSMA/CA
• the use of full-duplex capable Layer 2 switches
• the development of half-duplex switch operation
• the use of Gigabit Ethernet speeds
  

  Answers Explanation & Hints: The use of Layer 2 switches operating in full-duplex mode eliminates collisions, thereby eliminating the need for CSMA/CD.

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