ip access-list extended acl

An IP access-list extended (ACL) is a type of access control list used in network security to filter network traffic based on various criteria such as source and destination IP addresses, protocols, ports, and other parameters. It is a more advanced and flexible version of a standard access list that allows more specific filtering of traffic.

Extended ACLs are typically used in routers and firewalls to control access to network resources and to protect against unauthorized access, denial-of-service (DoS) attacks, and other security threats. They can be configured to permit or deny traffic based on specific criteria, and can be applied to inbound or outbound traffic on a network interface or a specific protocol.

Overall, IP access-list extended (ACL) is an important tool for ensuring network security and controlling network traffic.