Understanding the Difference Between Inbound and Outbound Access Control Lists (ACLs) in Computer Networking and Security

Which statement describes a difference between the operation of inbound and outbound ACLs?

In computer networking and security, Access Control Lists (ACLs) are used to control and filter network traffic.

The operation of inbound and outbound ACLs differs based on the direction of the traffic they control.

Inbound ACLs are applied on the ingress interface, meaning they control the traffic entering a network or a specific network interface. They are commonly used to filter incoming traffic from external sources, such as the internet, to protect the network from potential threats or unwanted traffic. Inbound ACLs determine what traffic is allowed or denied based on specified conditions, such as source IP address, destination IP address, ports, and protocols.

On the other hand, outbound ACLs are applied on the egress interface, meaning they control the traffic leaving a network or network interface. They are typically used to restrict or control the traffic leaving the network, allowing organizations to enforce policies and control the types of connections made to external networks. Outbound ACLs also define allowances and denials based on various conditions, but they focus on controlling the traffic leaving a network.

The main difference between inbound and outbound ACLs lies in the direction of the traffic they control. Inbound ACLs filter traffic entering the network, while outbound ACLs filter traffic leaving the network. This distinction allows network administrators to apply different rules and policies depending on the specific requirements and security needs of their network environment.

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