When receiving a packet, a router matches the packet againstACL rules. The ACL matching result is eitherMatchedorUnmatched. If the matching result isUnmatched, which of the following are possible causes?
A.
All rules are traversed but no matching rule is found.
B.
The packet matches an ACL rule with the deny action.
C.
No ACL is configured on the device.
D.
An ACL is configured but it does not contain any rules.
When a packet is checked against anAccess Control List (ACL), it is processed based on rule matches.
"Unmatched" scenariosoccur if:
A. TRUE→ The packetdoes not match any ACL rule.
C. TRUE→No ACL is configured, so there are no rules to match.
D. TRUE→An empty ACL exists, meaning no rules are defined.
B is incorrectbecauseif the packet matches a deny rule, it is "matched" and explicitly dropped, not "unmatched".
????Reference:Huawei HCIA-Datacom Study Guide, ACL Rule Matching and Processing Logic.
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