This article explains IPv6 fundamentals, compares it with IPv4 across address length, header format, security and configuration, and provides interview‑ready insights such as SLAAC auto‑configuration, dual‑stack transition, and common follow‑up questions.
The newly submitted IPv8 draft to the IETF claims 100% backward compatibility with IPv4, using a 64‑bit address format that blends a 32‑bit ASN prefix with a 32‑bit host part, while introducing integrated security and management services to address IPv4 exhaustion and slow IPv6 adoption.
This article provides a comprehensive overview of the OSI network layer, explaining its role in host‑to‑host communication, the mechanisms of packet forwarding and routing selection, router architecture, queueing strategies, and the details of IPv4 and IPv6 protocols, including migration techniques.
