Routers populate their routing tables by learning network destinations using what three types of routes?

• A. Static, Dynamic and Default
• B. Direct, Indirect and Recursive
• C. Local, Global, and External
• D. Primary, Secondary, and Tertiary

Answer: (A)

When building a routing table, a router relies on three main kinds of routes: those you configure by hand (static routes), those learned automatically through routing protocols (dynamic routes), and a default route that acts as a catch-all for destinations you don’t have a specific path for. Static routes give you predictable, fixed paths. Dynamic routes come from protocols like OSPF, EIGRP, RIP, or BGP, which adapt to topology changes by sharing route information. The default route (often 0.0.0.0/0) directs traffic toward a next-hop or gateway when there isn’t a more specific match in the table. Together, these three provide the usual ways a router learns and forwards packets.

Other terms like direct/connected, or concepts such as primary/secondary/tertiary, aren’t the standard trio used to describe how routing tables are populated.