+A **collision domain** is a segment of a [computer network](/wiki/Computer_Network) where only one device can transmit data successfully at a time. If multiple devices send signals simultaneously, their data [packets](/wiki/Packet) collide, requiring retransmission and reducing efficiency.
+## See also
+- [Broadcast Domain](/wiki/Broadcast_Domain)
+- [Hub](/wiki/Hub)
+- [Switch](/wiki/Switch)
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