What is a broadcast domain?

• A. A Realm Where Only Unicast Frames Are Transmitted.
• B. A Set Of Devices On A Network Segment That Receive All Broadcast Frames From Any Device Within That Segment.
• C. A Collision Containment Area.
• D. A Segment Where Only Multicast Frames Are Allowed.

Answer: (B)

Broadcast domains are the set of devices on a network that receive all broadcast frames from any device within that segment. In practice, a broadcast frame sent by one device is delivered to every other device in the same domain, so all recipients process it. Routers do not forward broadcast frames, which is why they define the boundaries of a broadcast domain; VLANs on switches can partition a larger network into separate broadcast domains. This is what makes a broadcast domain distinct from other concepts: unicast is a one-to-one delivery and doesn’t cause everyone in the segment to process the frame; a collision containment area refers to how access methods like shared Ethernet manage simultaneous transmissions and is not about the reach of broadcasts; multicast targets a specific group rather than everyone, so it isn’t the same as a broadcast domain.