单项选择题

Which statement is correct regarding the Junos OS?（）

A. The same Junos OS image is used on all Junos devices.
B. The Junos OS provides separation between the control and forwarding planes.
C. Each Junos OS image is based on model-specific source code.
D. The Junos OS creates a secondary instance of the kernel to ensure redundancy.

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单项选择题

What is the central processing component of the forwarding plane?（）

A. PFE
B. RE
C. Junos OS
D. forwarding table

单项选择题

Which statement describes transit traffic?（）

A. Traffic addressed to the chassis that requires some form of special handling by the RE before it can be forwarded out an egress port.
B. Traffic that enters an ingress port, is compared against the forwarding table, and is forwarded out an egress port.
C. Any traffic that requires the generation of an ICMP message.
D. Traffic that requires some form of special attention and does not pass through the device.

单项选择题

In the Junos OS, what handles transit traffic?（）

A. Transit traffic is handled by the RE only
B. Transit traffic is handled by the PFE only
C. Transit traffic is handled by both the RE and the PFE
D. Transit traffic is not handled by the RE or the PFE