Link-local addresses are automatically assigned when IPv6 is enabled on an interface, allowing devices on the same local network segment to communicate without the need for additional configuration or a router. These addresses use the prefix fe80::/10. Unique local addresses are used within a site or organization but require configuration. Global unicast addresses are globally routable on the Internet. Multicast addresses are used to send packets to multiple destinations simultaneously.
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Cisco CCNA 200-301
Network Fundamentals
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