Which two routing protocols are run by an Open Shortest Path First (OSPF) autonomous system border router (ASBR)?

The correct response highlights the primary routing protocols that interact with an Open Shortest Path First (OSPF) autonomous system border router (ASBR). OSPF is a widely used Interior Gateway Protocol (IGP), which operates within a single autonomous system to facilitate efficient routing. On the other hand, EGP, or Exterior Gateway Protocol, is employed to exchange routing information between different autonomous systems, making it essential for routers like the ASBR.

The ASBR functions as a bridge between OSPF and external networks or other routing protocols. It has the capability to understand both OSPF routing information from inside the autonomous system and EGP routing information from outside. Consequently, the combination of OSPF and EGP allows the ASBR to correctly route traffic both within its own internal network and to external networks, maintaining optimal data flow and connectivity across different routing domains.

In this context, other combinations that involve protocols such as RIP, BGP, or IGRP either do not pertain to the operational capacity of an ASBR or do not indicate the proper structure that requires both IGP and EGP functionality. Therefore, the identification of OSPF and EGP is critical to understanding the role of an ASBR in multi-domain routing