When two routers have exchanged routing information and established a relationship, this is referred to as?

When two routers exchange routing information and establish a relationship, it is referred to as "becoming adjacent." This term is commonly used in networking protocols, particularly in link-state protocols such as OSPF (Open Shortest Path First). In such scenarios, routers identify neighboring routers that share the same link or network segment, allowing them to share and synchronize routing information effectively.

Establishing adjacency is crucial as it forms the basis for efficient routing updates and allows routers to learn about the network topology. Once adjacency is determined, routers can discuss their link-state advertisements (LSAs) and build a complete topology map of the network, which is essential for making informed routing decisions.

Other terms, such as "forming a relationship" or "creating a neighbor relationship," might seem relevant but do not specifically convey the established state that occurs between routers when they exchange routing information and sync their databases. Thus, "becoming adjacent" precisely captures the concept as recognized in routing protocol terminology.