Standard ACLs should be applied as close to which endpoint as possible?

Standard ACLs should be applied as close to which endpoint as possible?

• A. Source
• B. Destination
• C. Switch
• D. Router

Answer: (B)

Standard ACLs, or Access Control Lists, are used primarily to filter traffic based on the source IP address. When implementing standard ACLs, they should be applied as close to the destination as possible. This positioning allows for the filtering of traffic right before it reaches its final destination, ensuring that only the permitted traffic is allowed through. Applying ACLs at the destination end also helps in managing bandwidth efficiently, as it drops unwanted traffic before it reaches the intended device. This can minimize unnecessary load on network resources, improve overall network performance, and enhance security by ensuring that potential harmful traffic does not even reach critical resources. For instance, if a standard ACL is placed at the source, it may restrict traffic from a specific source address before it even reaches an intermediate device, but such a restriction does not prevent unwanted packets from being managed by other devices or paths in the network. By filtering at the destination point, you gain more precise control over what traffic actually accesses the final destination, aligning with best practices in network security.

Standard ACLs, or Access Control Lists, are used primarily to filter traffic based on the source IP address. When implementing standard ACLs, they should be applied as close to the destination as possible. This positioning allows for the filtering of traffic right before it reaches its final destination, ensuring that only the permitted traffic is allowed through.

Applying ACLs at the destination end also helps in managing bandwidth efficiently, as it drops unwanted traffic before it reaches the intended device. This can minimize unnecessary load on network resources, improve overall network performance, and enhance security by ensuring that potential harmful traffic does not even reach critical resources.

For instance, if a standard ACL is placed at the source, it may restrict traffic from a specific source address before it even reaches an intermediate device, but such a restriction does not prevent unwanted packets from being managed by other devices or paths in the network. By filtering at the destination point, you gain more precise control over what traffic actually accesses the final destination, aligning with best practices in network security.