Which of the following best describes how a static route is identified in a routing table?

• A. A static route is identified by an S origin.
• B. A static route is identified by a D origin.
• C. A static route is identified by an O origin.
• D. A static route has no origin indicator.

Answer: (A)

Routes in a routing table carry an origin code that shows how the route was learned or created. Static routes are manually configured, so they carry an origin indicator that marks them as static. In most router implementations, that indicator is the letter S. This distinction helps the router and network engineers quickly tell apart routes added by an administrator from those learned through dynamic routing protocols (for example, OSPF uses O, EIGRP uses D, etc.). Because the static route has this S indicator, it’s identified this way, making it the correct description.