Which of the following best describes how an access control list (ACL) can be applied on a router interface to control packet flow?
It can only be applied in the outbound direction and filters traffic leaving the router.
It can only be applied in the inbound direction and filters traffic entering the router.
It can be applied inbound and/or outbound on the same interface, allowing filtering of packets entering or leaving the interface according to defined rules.
It can be applied in either direction, but once applied you cannot have both an inbound and an outbound ACL on the same interface.
An ACL can be bound to an interface in the inbound direction to inspect packets as they arrive and/or in the outbound direction to inspect packets as they leave. Administrators may place separate ACLs in each direction on the same interface, providing granular control over traffic entering and exiting the device.
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What are the different types of Access Control Lists (ACLs)?
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How do ACLs impact network performance?
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What is the purpose of using ACLs in network security?