What happens when two systems transmit at the same time?

What happens when two systems transmit at the same time?

• A. Collision
• B. Broadcast Storm
• C. Fragmentation
• D. Frame Duplication

Answer: (A)

When two devices transmit at the same time on a shared medium, their signals collide. In traditional Ethernet using a shared channel, devices listen before sending and watch the line while transmitting (CSMA/CD). If another device starts transmitting during your transmission, the signals interfere, creating a collision and garbled data on the wire. The network detects this collision, and both transmitters stop, wait for a random period, and then try again. This backoff helps prevent repeated collisions and allows fair access to the medium. Other options refer to different issues. A broadcast storm is an excessive flood of broadcast frames, usually from routing or spanning-tree misconfigurations. Fragmentation means breaking a large frame into smaller pieces to fit the network’s MTU, not a timing clash between transmitters. Frame duplication isn’t the event described by two systems transmitting simultaneously.

When two devices transmit at the same time on a shared medium, their signals collide. In traditional Ethernet using a shared channel, devices listen before sending and watch the line while transmitting (CSMA/CD). If another device starts transmitting during your transmission, the signals interfere, creating a collision and garbled data on the wire. The network detects this collision, and both transmitters stop, wait for a random period, and then try again. This backoff helps prevent repeated collisions and allows fair access to the medium.

Other options refer to different issues. A broadcast storm is an excessive flood of broadcast frames, usually from routing or spanning-tree misconfigurations. Fragmentation means breaking a large frame into smaller pieces to fit the network’s MTU, not a timing clash between transmitters. Frame duplication isn’t the event described by two systems transmitting simultaneously.