Which three statements correctly describe the default BGP advertisement behavior in the Junos OS?

In the context of Border Gateway Protocol (BGP) and the Junos OS, understanding the default advertisement behavior is crucial for effective routing and network design. The correct statement highlights that routes learned through External BGP (EBGP) are indeed advertised to Internal BGP (IBGP) peers. This behavior is foundational in establishing a consistent and effective routing policy across different autonomous systems and within the same autonomous system.

When a router learns a route via EBGP from another autonomous system, it will share that route with all of its IBGP peers to ensure that all routers within the same autonomous system have a consistent view of the routing table. This feature is essential in maintaining the operational integrity of the network, as it allows all routers configured with IBGP to reflect the routes learned from EBGP, thereby ensuring that traffic destined for various networks is routed appropriately.

The implications of this behavior facilitate the sharing of routing information, which is fundamental for BGP's design wherein routers must have the same routing knowledge to prevent routing loops and maintain efficient paths to external networks. This interconnectedness helps in building a cohesive routing environment within a single AS while still leveraging the broader connectivity provided by EBGP.

In summary, the statement correctly represents the default behavior of BGP in the