Which of the following statements are TRUE regarding carrier sense multiple access collision detection (CSMA/CD)? (Choose three.)

Last Updated on August 7, 2021 by Admin 3

Which of the following statements are TRUE regarding carrier sense multiple access collision detection (CSMA/CD)? (Choose three.)

  • Networks are segmented into multiple collision domains using switches for CSMA/CD networks.
  • Networks are segmented into multiple broadcast domains using switches for CSMA/CD networks.
  • CSMA/CD networks normally operate on half-duplex mode.
  • CSMA/CD networks normally operate on full-duplex mode.
  • Gigabit Ethernet uses CSMA/CD as the media access control method.
  • Gigabit Ethernet uses carrier sense multiple access with collision avoidance (CSMA/CA) as the media access control method.
Explanation:
The following statements are true:
– Networks are segmented into multiple collision domains using switches for CSMA/CD networks
– CSMA/CD networks normally operate on half-duplex mode
– Gigabit Ethernet uses CSMA/CD as its media access control method

CSMA/CD is a Local Area Network (LAN) access method used in Ethernet. In CSMA/CD, if a device or a node wants to send a packet in the network, it first determines if the network is free. If the network is not free, then the node will wait before sending the packet into a network. If the network is free, then the node sends the packet; if another device sends a packet simultaneously, their signals or packets collide. When the collision is detected, both packets wait for a random amount of time before retrying.

The option stating that networks are segmented into multiple broadcast domains using switches for CSMA/CD networks is incorrect because networks are segmented into multiple broadcast domains using routers for CSMA/CD networks.

The option stating that CSMA/CD networks normally operate on full-duplex mode is incorrect; these networks normally operate on half-duplex mode.

The option stating that gigabit Ethernet uses CSMA/CA as the media access control method is incorrect because gigabit Ethernet uses CSMA/CD as the media access control method.

Objective:
LAN Switching Fundamentals
Sub-Objective:
Describe and verify switching concepts

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