1. In general, a  broadcast describes a message sent to all individuals in an area (Like public address system).
2. In computer networking, the broadcast address is used to distribute a signal across a network, commonly used to declare to other devices on a network that a new device has connected to the network and to give those other devices information about the newly connected device. The broadcast address on a network is commonly an address that ends with 255. For example, a broadcast network mask is 255.255.255.255.
3. With wireless networks, routers will broadcast the SSID (Service Set IDentifier), allowing all wireless devices to easily find the wireless network.

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Tagged as: broadcast, broadcast address, network broadcast address, ssid