The CCDA certification requires a high-level understanding of the IP version 6 (IPv6) specifications, addressing, and some of the design issues. The IPv6 protocol is based on RFC 2460. From a network design standpoint, the most important features offered by IPv6 are as follows:
- 128-bit address space
- Supports hierarchical addressing and auto-configuration
- Every host can have a globally unique IPv6 address (no need for NAT)
- Hosts can have multiple addresses (multihoming)
- Efficient fixed header size for IPv6 packets
- Enhanced security and privacy headers
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