单项选择题

During OSPF adjacency formation, in what state is a router when it is negotiating to be in charge of the database synchronization process?（）

A. Init
B. 2Way
C. ExStart
D. Exchange

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单项选择题

By default, which command can be used to display information about packets that have been logged with the syslog firewall filter action?（）

A. show log
B. show firewall
C. show log messages
D. show firewall log

多项选择题

A firewall filter is applied as an input filter on a transit interface. What three types of traffic will this affect? （）

A. inbound traffic transiting the router
B. outbound traffic transiting the router
C. traffic destined to the Routing Engine
D. traffic destined to the interface address on which the filter is applied

多项选择题

Firewall filters can be used to accept, discard, or reject packets based on （）

A. protocol type
B. MAC address
C. TCP or UDP port
D. source and destination IP address