An overview of the OSI model and its security threats

The Open Systems Interconnection (OSI) model is a conceptual framework developed by the International Standards Organization (ISO). It has been in use for over 40 years, and is cited in every computer network book. It is also a favorite resource for just about every cybersecurity exam. The OSI model is represented in seven layers that help us understand how communications between computer systems occur. This is beneficial in troubleshooting network-related issues, since it exclusively separates protocols, services, and interfaces of each layer, and for manufacturers to maintain compatibility…