What is IPv6?
IPv6 is an Internet Protocol version for addressing and routing packets. Its 128-bit addresses provide much more address space than IPv4.
How it works and where it is used
1. How it works Routers forward packets using source and destination addresses in the IPv6 header. Addresses use hexadecimal groups; automatic configuration has separate specifications. 2. Applications and examples Services and local networks can use IPv6, often alongside IPv4 during transition. Application and firewall compatibility must be checked.
Limits and good practice
3. Limitations and security Large address space does not automatically provide anonymity or security. Missing IPv6 rules can expose services even when IPv4 is controlled. 4. Practical considerations Test AAAA records, routes, firewall rules and listening addresses together. IPv4-only checks can miss IPv6 exposure.