OSPF is a link-state routing protocol. It is designed to be run internal to a single ______ system. Each OSPF router maintains an identical ______ describing the autonomous system"s topology. From this database, a routing table is calculated by constructing a shortest-path ______. OSPF recalculates routes quickly in the face of topological changes, utilizing a minimum of routing ______ traffic. OSPF provides support for equal-cost multipath. An area routing capability is provided, enabling an additional level of routing protection and a reduction in routing protocol ______.

A. autonomous
B. network
C. computer
D. server