Description: Topology change refers to any alteration in the arrangement of network elements, which can include the addition, removal, or modification of network devices, as well as the reconfiguration of connections between them. In the context of routing protocols such as OSPF (Open Shortest Path First) and BGP (Border Gateway Protocol), topology change is a critical aspect that affects how data is transmitted across the network. OSPF, an interior routing protocol, uses a link-state algorithm that allows routers to exchange information about the network topology, quickly adapting to changes. On the other hand, BGP, which operates between different autonomous systems, manages interconnections and is essential for the stability of the Internet. Both protocols must be able to respond to changes in topology to ensure service continuity and efficiency in data transmission. The ability of a protocol to adapt to topology changes is essential for maintaining network resilience and availability, translating into optimal performance and a satisfactory user experience.