Cybersecurity For Beginners: Extended ACl Configuration on Cisco Devices

As the technology of computer networks and security continues to evolve, so does the need for more robust access control lists (ACLs).

An Extended ACL (also known as an extended access control list) is a type of access control list that provides more granular control over network traffic and is designed to be more effective than the standard ACL.

An extended ACL is a set of rules which can be used to filter network traffic, allowing or denying packets based on a variety of criteria. This type of ACL is ideal for more complex environments where a standard ACL may not be sufficient. For example, an extended ACL can be used to filter traffic based on source address, source port, destination address, destination port, protocol, and other criteria.

The main advantage of using an extended ACL is that it allows for more precise control of network traffic in a way that is not possible with a standard ACL.

By using extended ACLs, network administrators can create rules that are tailored to their network needs and can be used to block specific types of traffic, prevent attacks, and enforce network policies. Extended ACLs can also be used to create a firewall where incoming and outgoing traffic is filtered according to the rules set in the ACL.

This makes it possible to block certain types of traffic, such as malicious traffic or unwanted applications, from entering or leaving the network. Extended ACLs are becoming increasingly popular as organizations seek to increase their network security.

While extended ACLs are more complex than standard ACLs, their ability to provide more granular control makes them an ideal choice for organizations that require a higher level of security.


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