Which command shows the specific ACL rules applied on the router?

The command that displays the specific Access Control List (ACL) rules applied on a router is "show access-lists." This command provides detailed information about all current ACLs configured on the router, including the permit and deny statements within those lists. ACLs are crucial for controlling traffic to and from interfaces, and understanding the exact rules in effect can help network administrators manage security and traffic flow effectively.

Using this command, administrators can see the sequence of rules, evaluate how traffic is processed based on these rules, and troubleshoot access issues confidently. It gives a clear overview of both standard and extended ACL rules that are actively in place, enabling efficient management of network policies.

In contrast, other command options either do not exist or do not provide a complete list of ACL rules. For instance, "show ip access-list rules" is not a recognized command, "display access-lists summary" is not standard in Cisco IOS, and "show running-config access-lists" is not a valid command format; the running configuration is typically viewed with "show running-config" followed by specifying the focus area.