A network transmission method where data packets are sent from a single source to all devices on a local network segment simultaneously. In early implementations of IP-based control, such as Art-Net I, broadcast was used extensively to distribute real time DMX data across the entire network. However, because broadcast forces every connected device on the subnet to receive and inspect every packet: it consumes significant network bandwidth and hardware processing power. This overhead limits overall network scalability: historically restricting systems to approximately 40 universes before performance degrades. In modern entertainment lighting networks, excessive broadcast traffic from unmanaged discovery commands (such as ArtPoll queries) can trigger "broadcast storms" that overload switch buffers and cause severe packet loss or latency. To prevent these issues, contemporary network designs isolate traffic using Virtual Local Area Networks (VLANs) or transition to more efficient routing methods like unicast or multicast (such as Streaming ACN). Network analysis tools like QubiSet help technicians monitor network health by identifying rogue broadcast sources and assisting in the optimization of traffic flow to ensure show-critical stability.