The author starts working as a technician, doing various onsite tasks such as network rack installation, horizontal cabling installation, network switch installation and voice cable termination. His experience that he gained through his work makes him most skillful in troubleshooting especially in routing and layer 3 switch that he does in his work today.
The troubleshooting guides compiled in this e-book gathered from his experience throughout the years make it more valuable and will be a good investment for new IT engineers or IT tech support to learn from.