Explanation: With the advent of IPv6, many routing protocols have been updated or specifically developed to support the new addressing scheme. IPv6 routing protocols ensure that routers can exchange IPv6 routes and maintain connectivity in an IPv6-enabled network. Let’s analyze each option: A. OSPFv3: OSPFv3 is the version of the Open Shortest Path First (OSPF) protocol designed specifically for IPv6. It retains many of the core concepts of OSPF for IPv4 but has been adapted to handle IPv6 addresses and headers. OSPFv3 uses link-state advertisements (LSAs) to exchange routing information, and its operation is similar to OSPF in IPv4 environments. B. RIPng: RIPng (RIP next generation) is an updated version of the Routing Information Protocol (RIP) designed to support IPv6. Like its IPv4 counterpart, RIPng is a distance-vector routing protocol that uses hop count as its metric. However, RIPng has been modified to handle IPv6 addresses and does not include IPv4-specific information. C. EIGRP for IPv6: EIGRP, Cisco’s proprietary routing protocol, also supports IPv6 through a dedicated version known as EIGRP for IPv6. It functions similarly to EIGRP for IPv4, using a composite metric that factors in bandwidth, delay, and other parameters to determine the best path. The configuration for IPv6 is somewhat similar, although the commands and structure are adapted for IPv6’s addressing. D. BGP: Border Gateway Protocol (BGP) is a path-vector routing protocol used primarily for interdomain routing (i.e., between different autonomous systems). BGP supports both IPv4 and IPv6, and IPv6 BGP is widely used in service provider environments to exchange IPv6 routes between different networks. BGP’s versatility and scalability make it essential for global Internet routing. E. RIPv2: RIPv2 is an enhancement of the original RIP protocol and supports features such as VLSM (Variable Length Subnet Masking) and multicast updates. However, RIPv2 is designed exclusively for IPv4 and does not support IPv6. For IPv6 networks, RIPng is used instead. Importance for Network Engineers: Understanding which routing protocols support IPv6 is crucial as IPv6 adoption continues to grow. Network professionals must know how to deploy and troubleshoot these protocols in an IPv6 environment. Many networks now operate in dual-stack mode, where both IPv4 and IPv6 are active, making it essential to know the differences and configuration nuances between protocols that support each version. For the CCNA exam, questions about IPv6 routing protocols test your knowledge of how modern networks adapt traditional routing protocols to support new addressing schemes. This includes understanding the operational differences and configuration changes required for protocols like OSPFv3, RIPng, EIGRP for IPv6, and BGP. In summary, OSPFv3, RIPng, EIGRP for IPv6, and BGP all support IPv6 routing, while RIPv2 does not. This knowledge is fundamental to managing modern networks that use both IPv4 and IPv6.