What kind of information does an extended ACL filter on?

An extended Access Control List (ACL) filters traffic based on multiple criteria, which includes both source and destination IP addresses. This capability allows network administrators to make more granular decisions about the traffic that is allowed or denied, as it not only considers where the traffic is coming from (source IP) and where it is going (destination IP), but it can also filter based on protocols (such as TCP, UDP, or ICMP), specific ports, and other attributes.

This level of filtering is essential for implementing security measures that provide finer control over network access and can help protect the network from unwanted traffic and potential security threats. By being able to specify both source and destination parameters, administrators can tailor the rules to meet specific needs, which enhances the overall security and management of the network.