Broadcast refers to a method of data transmission in a network where data is sent from a single source to multiple or all participants in the network. In contrast to Unicast, where data is sent from one source to a single recipient, and Multicast, where data is sent to a predefined group of recipients, in Broadcast, data is sent to all participants in the network, regardless of whether they need the data or not.
Broadcast is commonly used in networks to disseminate information that is of interest to all participants, such as ARP (Address Resolution Protocol) requests, where a device wants to identify the MAC address of another device on the network, or DHCP (Dynamic Host Configuration Protocol) requests, where devices request IP addresses from a DHCP server.
Although Broadcast provides a simple way to distribute data in the network, it can lead to network congestion, especially in larger networks, since all participants must receive the transmitted data regardless of whether it is relevant or not. For this reason, Broadcast is often used with caution in larger networks and replaced by more efficient techniques like Multicast where appropriate.
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