xi ■ Chapter 16 Maintaining the Network, formerly Chapter 17, now includes new infor- mation about network documentation and diagrams and networking monitoring. ■ Chapter 17 Fundamentals of Troubleshooting a Network was previously Chapter 18. It features CompTIA’s newly revised troubleshooting guidelines, information about new troubleshooting tools, and a discussion of the boot processes of newer operating systems. ■ Chapter 18 Designing and Installing a New Network, formerly Chapter 19, received minor revisions and updates. ■ Chapter 19 Network+ Certifi cation Exam Preparation, formerly Chapter 20, has been updated to align with the CompTIA N10-007 Network+ Exam objectives. ■ Chapter 20 Employment in the Field of Networking Technology was Chapter 21 in the previous edition. It now includes coverage of digital citizenship and soft skills. Digital citizenship is important for all occupations and even more important for IT careers. Soft skills are equally important, as these are the skills employers look for when hiring and promoting employees.