A mid-sized organization has a network with multiple branches. The network administrator is evaluating whether to use static or dynamic routing for managing network traffic. Which of the following statements best differentiates between static and dynamic routing protocols?

The primary and most significant difference between static and dynamic routing is adaptability. Dynamic routing protocols, such as Routing Information Protocol (RIP) and Open Shortest Path First (OSPF), are designed to automatically learn the network topology and exchange routing information with other routers. When a network change occurs, such as a link failure or the addition of a new network segment, these protocols automatically recalculate paths and update their routing tables without manual intervention. This ensures network traffic is rerouted efficiently, enhancing network resilience and reducing administrative overhead in complex or changing environments. Static routing, in contrast, requires manual configuration for every route, which does not adapt to network changes.

A. Static routing requires more, not less, administrative effort for any network change or growth, as each route must be manually configured and updated.
C. Static routing is poorly suited for large, complex networks due to its lack of scalability and the immense administrative burden of manual configuration.
D. This statement is factually incorrect. RIP and OSPF are quintessential examples of dynamic routing protocols, not static routing methods.

1. Kurose, J. F., & Ross, K. W. (2021). Computer Networking: A Top-Down Approach (8th ed.). Pearson. In Chapter 5, Section 5.2, "Routing Algorithms," the text explicitly contrasts static and dynamic routing, stating, "With dynamic routing algorithms, the routes change as the network traffic or topology changes," which directly supports the adaptability described in the correct answer.

2. Cisco. (2023). IP Routing: Static and Dynamic Routing. Cisco Networking Academy. In the section "Comparing Static and Dynamic Routing," the documentation highlights, "Dynamic routing protocols... can dynamically adjust to logical network topology changes." This confirms that automatic adjustment is a key feature of dynamic routing.

3. Dordal, P. L. (2019). An Introduction to Computer Networks (2nd ed.). Loyola University Chicago, Department of Computer Science. In Chapter 10, "Routing-Update Algorithms," Section 10.1 "Distance-Vector Routing-Update Algorithm," it is explained that dynamic protocols like distance-vector "allow routers to adapt to link failures." This contrasts with static routing, which is described as non-adaptive.