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1 Introducing Basic Network Concepts “In the beginning, there were no networks. Life was bad.” —MIKE MEYERS In this chapter, you will learn how to. Here is a brief outline of the seven-layer OSI networking model: Layer. The Application Layer is the layer that most net- work users are exposed to, and is the level at which human communication happens. HTTP, FTP, and. SMTP are all application layer protocols. The human sits above this.

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COMPUTER NETWORKS. Lecture Notes. DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING. SHRI VISHNU ENGINEERING COLLEGE FOR. The hosts are owned by the customers (e. Vista-boot Image.ima Download. g., people's personal computers), whereas the communication subnet is typically owned and operated by a. -A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. -Each of the devices on the network can be thought of as a node; each node has a unique address. -Addresses are numeric quantities that are easy for computers to work with, but.