Which three statements correctly describe ACL processing of packets? (Choose three.)

IT Exam Items Repository › Category: CCNP ENARSI v9 › Which three statements correctly describe ACL processing of packets? (Choose three.)

Which three statements correctly describe ACL processing of packets? (Choose three.)

  • An implicit deny any rejects any packet that does not match any ACE.
  • A packet can either be rejected or forwarded as directed by the ACE that is matched.
  • A packet that has been denied by one ACE can be permitted by a subsequent ACE.
  • A packet that does not match the conditions of any ACE will be forwarded by default.
  • Each statement is checked only until a match is detected or until the end of the ACE list.
  • Each packet is compared to the conditions of every ACE in the ACL before a forwarding decision is made.

Explanation: Access Control Lists (ACLs) follow a strict logic where entries are processed from the top to the bottom in order. When a packet matches an Access Control Entry (ACE), it is immediately executed as either a permit or a deny, and the router stops checking further statements. If a packet reaches the end of the list without matching any specific ACE, it is automatically dropped by an invisible implicit deny any statement.

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