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This course presents an overview of networking, both from an implementation and from an application point of view. The OSI model is used to create a conceptual framework for the course. The material starts by looking at local area network technologies and then explores wide area networking technologies, and, in particular, looks at the Internet and the TCP/IP protocols in detail. Forwarding and Routing in the Internet are discussed. Application level interfaces are discussed. The issue of security is explored. Protocols for various networking services are reviewed.