Multiple choice

Interface s0/0/0 already has an IP ACL applied inbound. What happens when the network administrator attempts to apply a second inbound IP ACL?

  1. Both ACLs are applied to the interface.

  2. The second ACL is applied to the interface, replacing the first.

  3. The network administrator receives an error.

  4. Only the first ACL remains applied to the interface.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When applying an ACL to an interface, Cisco IOS allows only one ACL per direction per protocol. If an inbound IP ACL is already applied and you attempt to apply another inbound IP ACL, the second ACL replaces the first - you cannot have multiple inbound ACLs on the same interface for the same protocol. This is by design to avoid conflicts and maintain predictable security policies.

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