"Guide to Networking Essentials" provides the knowledge and hands-on skills needed to work with network infrastructure devices and operating systems in a small- to medium-sized network environment. By focusing on troubleshooting and computer networking technologies, this book offers a comprehensive introduction to network protocols and devices, including wireless and cybersecurity technologies. Packet Tracer virtual labs allow you to perform network configuration and troubleshooting tasks without the need for physical lab equipment. Updated content reflects the latest networking technologies and operating systems, including new Ethernet and Wi-Fi standards. The 9th edition covers the objectives of the Cisco Certified Support Technician (CCST): Networking 100-150 certification exam to prime you with the skills to configure, troubleshoot and support a small- to medium sized network.