Ethernet Standards

CE

The correct answers are E and D.

Explanation:

Ethernet is a set of networking technologies that allow computers and other devices to communicate over a local area network (LAN). Ethernet standards define how data is transmitted over the network and how devices communicate with each other.

A. When an Ethernet network uses CSMA/CA, it terminates transmission as soon as a collision occurs. This statement is not true. CSMA/CA stands for Carrier Sense Multiple Access with Collision Avoidance. In CSMA/CA, devices listen for other devices transmitting data before sending their own data to avoid collisions. If a collision is detected, the device waits for a random amount of time before trying to send the data again. There is no immediate termination of transmission when a collision occurs.

B. Ethernet is defined by IEEE standard 802.2. This statement is not true. IEEE 802.2 defines the Logical Link Control (LLC) sublayer of the data link layer in the OSI model. Ethernet is defined by IEEE standard 802.3.

C. When an Ethernet network uses CSMA/CD, it terminates as soon as a collision occurs. This statement is not entirely true. CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection. In CSMA/CD, devices listen for other devices transmitting data before sending their own data to avoid collisions. If a collision is detected, the device stops transmitting immediately and enters a backoff algorithm before trying to send the data again. So, it is not entirely true that it terminates as soon as a collision occurs.

D. Ethernet 10BASE-T does not support full-duplex. This statement is true. Ethernet 10BASE-T, which is a type of Ethernet that uses unshielded twisted pair (UTP) cabling, does not support full-duplex communication. Full-duplex communication allows devices to send and receive data simultaneously.

E. Ethernet is defined by IEEE standard 802.3. This statement is true. IEEE 802.3 defines Ethernet standards, including the physical layer and the data link layer specifications.