Final answer:
Among the listed protocols, IS-IS and OSPF are the link-state routing protocols. They build a full network map for path calculation, which is a different approach compared to distance-vector protocols like RIP, IGRP, EIGRP, and EGP; and the path-vector protocol BGP.
Step-by-step explanation:
The link-state routing protocols among the choices given are IS-IS and OSPF.
Intermediate System to Intermediate System (IS-IS) and Open Shortest Path First (OSPF) are both protocols that build a complete map of the network by collecting information from all the routers. Each router then independently calculates the best path to every destination in the network. This differs from distance-vector routing protocols like RIP, IGRP, and EIGRP which periodically share their routing tables with their immediate neighbors.
Other protocols mentioned, such as Border Gateway Protocol (BGP), Routing Information Protocol (RIP), Enhanced Interior Gateway Routing Protocol (EIGRP), Interior Gateway Routing Protocol (IGRP), and Exterior Gateway Protocol (EGP), are not considered link-state routing protocols. BGP is a path-vector protocol whereas RIP, IGRP, EIGRP, and EGP are distance-vector protocols.