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The network is an environment in which users exchange data through specific paths. This data can be vulnerable to many types of threats such as intruders who attempt to enter into these paths and perform illegal activities when they have the appropriate opportunity for doing that. In computer networks, data must be directed more carefully. Networks are actually composed of a collection of LANs that are interconnected. Routers take network data messages from a LAN and convert them into packets suitable for transmission through a Wide Area Network (WAN). The goal is almost always to get these packets to another LAN and ultimately to the correct host on that LAN.
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