Clearly explain the difference between unicast, multicast and broadcast traffic at Layer 3.
Try an answer before revealing the guidance below.
Key Concepts
- Unicast
- Multicast
- Broadcast
- Destination set
Answer Approach
- Compare the intended recipient set for each delivery mode.
- Mention group membership for multicast.
- Mention the scope of a broadcast.
Full Answer
Answer status: Draft answer (unofficial). Revision notes, not an official marking scheme.
Unicast targets one destination host. Multicast targets members of a selected group, allowing a sender to reach several interested receivers. Broadcast targets every host in the relevant broadcast domain or subnet; routers generally do not forward local broadcasts across the Internet.
Shortcuts: K concepts · A approach · F answer · R reviewed · B bookmark · ← / → previous / next