Permit:Allows traffic to pass according to the rule.
Deny:Silently drops the traffic without notifying the source.
Reject:Drops the trafficand sends a TCP RST (for TCP) or ICMP unreachable (for UDP/other protocols)back to the source. This provides feedback to the sending host.
Next-policy:Allows policy chaining to evaluate the next policy set.
Therefore, the action that causes traffic to drop and a message to be sent to the source isreject.
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