vii Network+ Note Th e Network+ Note feature provides students with tips and facts regarding the CompTIA Network+ Certifi ca- tion Exam. Th ese tips will help students study for the certifi cation exam. Caution Th e Caution feature highlights important personal- and machine-safety information students need to know be- fore performing networking tasks. Th ese alert students to actions that may cause personal injury or damage to a computer or electronic device. Visuals Chapter fi gures have been strategically created to high- light important information. Illustrations, photos, dia- grams, and screen captures help students visualize the concepts discussed in the text for better understanding and retention of the material, as well as future applica- tion of the content. End-of-Chapter Content End-of-chapter material provides an opportunity for review and application of concepts. ■ A concise Summary reiterates the chapter out- comes and provides a brief review of the content for student reference. Th is helps students focus on important concepts presented in the text. ■ Review Questions highlight basic concepts presented in the chapter so students can evaluate their understanding of the material. ■ Sample Network+ Exam Questions challenge students to answer questions similar to those they will face on the CompTIA exam, providing a sample of what to expect on the exam.