Question:
What is true about Ethernet? (Choose Two.)
- 802.2 Protocol
- 802.3 Protocol
- 10BaseT half duplex
- CSMA/CD Stops transmitting when congestion occurs
- CSMA/CA Stops transmitting when congestion occurs
Explanation: Carrier sense multiple access with collision detection (CSMA/CD) is a media access control method used most notably in early Ethernet (IEEE 802.3) technology for local area networking. When collision detection (CD) observes a collision (excess current above what it is generating, i.e. > 24 mA for coaxial Ethernet), it stops transmission immediately and instead transmits a 32-bit jam sequence.
Note: CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is a protocol for carrier transmission used in wireless networks. Unlike CSMA/CD (Carrier Sense Multiple Access/Collision Detect) which deals with transmissions after a collision has occurred, CSMA/CA acts to prevent collisions before they happen.
Exam with this question: CCNA v3.0 (200-125) Study Guide – Exam Dumps
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