Which statement BEST describes unicast addressing?

• A. To the nearest member of a group
• B. One-to-one
• C. Broadcast to all devices on the network
• D. One-to-many to a group

Answer: (B)

Unicast addressing describes one-to-one communication: data is sent from a single sender to a single, specific destination. The destination address uniquely identifies that endpoint, so only that device processes the packet. This is how most normal communications work, like your browser request to a single web server—the IP and, at the data-link layer, the MAC address point to only that server, and routers forward the frame toward that destination. The other ideas describe different delivery scopes: broadcasting sends to all devices on the network, and multicast delivers to a group of devices. (Anycast would target the nearest member of a group, which is distinct from unicast.)