Which two statements describe the forwarding table in the Junos OS? (Choose two.)
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A. B. C. D.BC
The Junos OS has two main tables related to packet forwarding: the routing table and the forwarding table. The routing table contains all known routes, while the forwarding table stores a subset of information from the routing table.
Answer A is incorrect because it implies that all known routes are stored in the forwarding table, but this is not the case. The forwarding table is a subset of the routing table.
Answer B is correct because the forwarding table is a subset of the routing table. Specifically, it contains the most specific routes from the routing table that have been selected for forwarding.
Answer C is correct because Junos devices use the forwarding table to determine the next hop for incoming packets. When a packet arrives at a device, the device compares the destination IP address of the packet to the entries in the forwarding table. If a match is found, the device forwards the packet to the next hop specified in the matching forwarding table entry.
Answer D is incorrect because the forwarding table uses the most specific (i.e., longest prefix) match to forward packets toward the destination. If multiple matches exist in the forwarding table, the device selects the most specific match to use for forwarding.