單項選擇題

If the PFE does not have a route to the destination address of a packet, which action will be taken?（）

A.The PFE floods the packet out of all interfaces.
B.The PFE drops the packet and sends a destination unreachable notification back to source device.
C.The PFE forwards the packet to the routing engine for furtherprocessing.
D.The PFE queues the packet and sends are quest for a layer3 lookup to the routing engine.

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多項選擇題

For which two functions is the Routing Engine responsible?（）

A.packet forwarding
B.queuing functions
C.routing protocol control
D.JUNOS software operation

單項選擇題

What is the interface connecting the routing engine to the packet forwarding engine called?（）

A.Loopback 0
B.management
C.internal（fxp1）
D.control interface