Which of the following will listen on the line to ensure there is no traffic transmitting and implement a back-off timer if a collision occurs?
A.
CSMA/CD B.
CSMA/CA C.
MPLS D.
OSPF.
A.
Which of the following will listen on the line to ensure there is no traffic transmitting and implement a back-off timer if a collision occurs?
A.
CSMA/CD
B.
CSMA/CA
C.
MPLS
D.
OSPF.
A.
The correct answer is A. CSMA/CD.
CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection. It is a network access method used in Ethernet networks where devices share the same communication medium (such as a coaxial cable or twisted pair cable).
When a device wants to transmit data, it listens on the line to check if there is any traffic being transmitted. If the line is clear, the device starts transmitting. However, if two devices start transmitting at the same time, a collision occurs. CSMA/CD detects the collision and stops the transmission, and each device waits for a random period of time before trying to transmit again. This random back-off timer is used to avoid further collisions and to prevent the devices from continuously trying to transmit simultaneously.
In summary, CSMA/CD listens on the line to ensure there is no traffic transmitting, and implements a back-off timer if a collision occurs, making it an effective network access method for shared communication media.