Cisco Systems 2 Network Router User Manual


 
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Explanation: Adding an access list to a router, as a packet filter is a two-step process. First, you create the list.
Then, you apply that list to any interface that you want to filter the selected traffic.
Incorrect Answers:
C is incorrect; an existing access list is bound to the interface
D is incorrect; there is no need to copy an access list, an access list can be bound to multiple interfaces.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 310-311.