What will be the active route when a Junos device receives multiple routes for the same prefix from different protocols?

When a Junos device receives multiple routes for the same prefix from different protocols, it uses a process called route preference to determine which route will be active. In general, the system has predefined preferences for routes learned via different protocols. For instance, static routes typically have a higher preference than most dynamic protocols, and among dynamic protocols, OSPF usually has a higher preference than RIP.

However, if the routing protocols used have equivalent route preferences, or if the routes are of equal preference, the Junos device can install multiple routes for the same prefix into the routing table. This is known as having parallel routes. The device can load-balance traffic across these routes, allowing for redundancy and increased throughput.

In this case, the correct answer reflects that the device can indeed have both routes active if their preferences allow for it, thereby acknowledging the capability of the routing architecture to support multiple learned paths for the same destination.