What is ACL,what is routing,tell something about switching and osi layers

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ACL is Access Control List used to control network traffic. Routing is the process of forwarding data packets between networks. Switching is the process of forwarding data packets between devices. OSI layers are a model for understanding and designing computer networks.

ACL is used to filter network traffic based on rules and policies.
Routing involves selecting the best path for data packets to travel between networks.
Switching involves forwarding data packets between devices on the same network.
OSI layers are a model for understanding how data is transmitted between devices on a network, with each layer responsible for a specific function.
Examples of OSI layers include the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.