This Book excerpt is a guide to managing and troubleshooting networks, specifically using the CompTIA Network+ certification exam as a guide. It covers the basics of networking, including physical layer components, the OSI model, IP addressing, routing, TCP/IP, DNS, and more. The text also features hands-on exercises using Windows, Linux, and Cisco IOS to gain practical experience in configuring and troubleshooting networks, and it discusses various security threats and best practices for mitigating them.
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