Cisco Certified Network Associate (CCNA) Practice Exam

Which IPv6 address type is used to send packets to a single interface?

1. IPv6 Anycast address

2. IPv6 Unicast address

3. IPv6 Multicast address

4. IPv6 Global Unicast address

The correct answer is: IPv6 Unicast address

The IPv6 Unicast address is specifically designed for identifying a single interface on a network. When data packets are sent to a unicast address, they are directed to a single destination interface, ensuring that the intended device receives the data. Each unicast address is unique to the specific interface, facilitating direct communication between devices without confusion or interference from other devices on the network. This address type contrasts with others, such as multicast addresses, which are intended for sending packets to multiple interfaces simultaneously, and broadcast addresses, which are not utilized in IPv6 but exist in IPv4 for similar functionality. The purpose of anycast addresses is to send packets to the nearest interface in a group of potential receivers, rather than solely focusing on a single interface. In summary, the defining characteristic of IPv6 Unicast addresses is their ability to target a single interface for packet delivery, making them essential for one-to-one communication in IPv6 networks.