What is the difference between static and dynamic routing?

• A. Static is IPv6-only; dynamic is IPv4-only
• B. Static uses BGP automatically; dynamic requires manual changes
• C. Static requires manual route entries; dynamic uses routing protocols to discover and adapt to network changes.
• D. Static uses DNS; dynamic uses DHCP

Answer: (C)

The main idea here is how routes are learned and kept up to date. Static routing requires you to manually enter specific routes into each router’s routing table. Those paths stay fixed until you edit them, which makes the setup simple and predictable but not resilient to changes like a failed link or a topology change. Dynamic routing, on the other hand, uses routing protocols (such as OSPF, EIGRP, RIP, or BGP) to exchange information between routers. They automatically discover reachable networks, compute the best paths based on metrics, and adapt when the network changes, rerouting traffic as needed without manual intervention.

So static routing gives low overhead and simplicity but lacks automatic recovery, while dynamic routing scales better and remains flexible in changing networks due to protocol-driven learning and convergence.

The other choices aren’t correct for this concept: routing isn’t about IPv4 vs IPv6 in static vs dynamic terms; dynamic routing isn’t about manual changes, it’s about automatic protocol-based updates; and routing is not determined by DNS or DHCP, which handle name resolution and address assignment rather than path discovery.