Which protocol type shares routing information within an autonomous system (AS)?

The choice of an Interior Gateway Protocol (IGP) as the correct answer pertains to its specific role in routing within an autonomous system (AS). An IGP is designed to facilitate the exchange of routing information about the routes available within a single autonomous system, enabling routers to communicate efficiently and make informed decisions about the best paths for data to travel.

Examples of IGPs include protocols like RIP (Routing Information Protocol) and OSPF (Open Shortest Path First). Each of these protocols allows routers within the same AS to share information about their networks, such as connected devices and the state of their respective links, which helps in maintaining an updated and accurate routing table.

In contrast, an Exterior Gateway Protocol (EGP) is used to exchange routing information between different autonomous systems. A Link State Protocol is a category of IGP, focused specifically on how routers learn about the state of the links in their network; it is a subset of IGP but does not encompass all IGPs. Dynamic Routing Protocol is a broader term that can include both IGPs and EGPs; however, it does not specify the context of sharing routing information specifically within an AS. Therefore, the specificity that IGP provides in the context of sharing routing information