Which statement about IPv6 routing protocol address families is true?

Which statement about IPv6 routing protocol address families is true?

• A. They do not use address families.
• B. They rely on a single IPv6 address family.
• C. They use separate IPv6 address families for different routing domains.
• D. They use address families to segregate IPv6 routes with IPv6-specific updates.

Answer: (D)

In routing protocols, address families create separate channels for different kinds of routing information. For IPv6, the IPv6 address family carries only IPv6 routes, NLRI, and updates, isolated from IPv4 traffic. This separation means that when IPv6 routes are exchanged, the updates and processing are specifically for IPv6, not mixed with IPv4. That’s why the statement that they use address families to segregate IPv6 routes with IPv6-specific updates is the best fit: it directly describes how IPv6 routing information is kept distinct and updated using IPv6-specific mechanisms. The other options don’t reflect how modern routing protocols organize data—there isn’t just a single IPv6 address family, and updates aren’t generalized across versions; IPv6 uses its own dedicated address family to handle its routes.

In routing protocols, address families create separate channels for different kinds of routing information. For IPv6, the IPv6 address family carries only IPv6 routes, NLRI, and updates, isolated from IPv4 traffic. This separation means that when IPv6 routes are exchanged, the updates and processing are specifically for IPv6, not mixed with IPv4. That’s why the statement that they use address families to segregate IPv6 routes with IPv6-specific updates is the best fit: it directly describes how IPv6 routing information is kept distinct and updated using IPv6-specific mechanisms. The other options don’t reflect how modern routing protocols organize data—there isn’t just a single IPv6 address family, and updates aren’t generalized across versions; IPv6 uses its own dedicated address family to handle its routes.