200-301 Question 74
Single answerA network administrator is troubleshooting a connectivity issue between two devices connected via Ethernet. The devices are part of a shared media environment. What is a key characteristic of Ethernet in a shared media setup that could cause a collision, and how can it be mitigated?
- A
Ethernet in a shared media environment uses CSMA/CD to manage access to the medium.
- B
Point-to-point Ethernet connections always require CSMA/CD for collision management.
- C
Switches eliminate collisions in shared media Ethernet environments.
- D
Shared media Ethernet environments use full-duplex communication to prevent collisions.
Show answer and explanation
Correct answer: A
Explanation
In shared media Ethernet environments, multiple devices share the same communication medium. To manage access and avoid conflicts, Ethernet uses CSMA/CD. This protocol listens to the medium, detects collisions, and retransmits data when necessary. Understanding this characteristic is essential for troubleshooting shared media setups.
- A. Correct.
Ethernet in a shared media environment employs Carrier Sense Multiple Access with Collision Detection (CSMA/CD) to manage access to the medium and handle collisions. This is a key characteristic of shared media setups.
- B. Incorrect.
Point-to-point Ethernet connections typically use full-duplex communication, which eliminates the need for CSMA/CD as collisions cannot occur in full-duplex communication.
- C. Incorrect.
Switches do not eliminate collisions in shared media Ethernet environments. Switches are used to segment networks and create point-to-point links, effectively removing shared media environments.
- D. Incorrect.
Full-duplex communication is not used in shared media Ethernet environments. Shared media setups rely on half-duplex communication, where collisions can occur.