What does the 0.0.0.0/0 route represent in IP routing?

• A. It represents the local subnet's default route.
• B. It points to a specific internal static route.
• C. It designates the DNS server.
• D. It represents the default route used for destinations not in the local routing table.

Answer: (D)

0.0.0.0/0 is the default route in IPv4 routing. It matches any destination address and serves as a catch-all when no more specific route exists in the routing table. Routers send such traffic toward the next-hop gateway or exit interface defined by this route, which is typically the ISP gateway in home networks or the upstream router in larger networks. This route is not used for local subnets and is not a DNS server or a specific internal static path; those would appear as separate, more specific entries in the routing table.