多项选择题

Which two statements are correct about firewall filters in the Junos OS?（）

A. Firewall filters are stateless.
B. Firewall filters are used to control routing information that is exchanged between devices.
C. Firewall filters are used to control traffic passing through the device.
D. Firewall filters can only be applied to traffic entering the device.

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单项选择题

What is the purpose of unicast reverse path forwarding?（）

A. to validate packet receipt on interfaces where the traffic should be received
B. to forward packets out the interfaces where the traffic should be received
C. to forward packets out the interfaces where the traffic should be sent
D. to validate packet receipt on interfaces where the traffic should be sent

单项选择题

What is the default action for firewall filters?（）

A. accept
B. reject
C. discard
D. log

单项选择题

Which statement is correct about policies in the Junos OS?（）

A. Export policies are used to filter routes from the RE forwarding table to the PFE forwarding table.
B. Export policies are used to filter routes destined for the routing table.
C. Export policies are used to filter routes being sent to neighboring devices.
D. Export policies are used to filter traffic leaving the device.