Which statement is true about routing tables on a Junos device?
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A. B. C. D.D
B. They exist in two places: the Routing Engine and the Packet Forwarding Engine.
This statement is true about routing tables on a Junos device.
Routing tables on Junos devices are stored in two places: the Routing Engine (RE) and the Packet Forwarding Engine (PFE). The Routing Engine maintains a master copy of the routing table, which contains all the routes learned from various sources such as static routes, connected routes, and dynamic routing protocols. The Routing Engine is responsible for making decisions about the best path for forwarding traffic based on the contents of the routing table.
The Packet Forwarding Engine, on the other hand, is responsible for forwarding data packets through the device. It receives forwarding instructions from the Routing Engine and uses these instructions to populate the forwarding table. The forwarding table is a subset of the routing table that contains only the best path routes selected by the Routing Engine for forwarding packets.
Therefore, the routing tables on a Junos device are not exclusively designed to handle dynamic routing protocols, as stated in option C. Routing tables on Junos devices handle all types of routes, including static routes and connected routes.
Option A is incorrect because routing tables on Junos devices do not purge any routes not selected as active routes. Instead, these routes remain in the routing table as backup routes in case the active route fails.
Option D is also incorrect because it is the forwarding table that is populated based on the information in the routing table. The routing table is not populated based on the contents of the forwarding table.