Introduction to Networks Companion Guide v5.1

Introduction to Networks Companion Guide v5.1 is the official supplemental textbook for the Introduction to Networks course in the Cisco® Networking Academy® CCNA® Routing and Switching curriculum. The course introduces the architecture, structure, functions, components, and models of the Internet and computer networks. The principles of IP addressing and fundamentals of Ethernet concepts, media, and operations are introduced to provide a foundation for the curriculum. By the end of the course, you will be able to build simple LANs, perform basic configurations for routers and switches, and implement IP addressing schemes.

The Companion Guide is designed as a portable desk reference to use anytime, anywhere to reinforce the material from the course and organize your time.

The book’s features help you focus on important concepts to succeed in this course:

• Chapter Objectives—Review core concepts by answering the focus questions listed at the beginning of each chapter.
• Key Terms—Refer to the lists of networking vocabulary introduced and highlighted in context in each chapter.
• Glossary—Consult the comprehensive Glossary with more than 250 terms.
• Summary of Activities and Labs—Maximize your study time with this complete list of all associated practice exercises at the end of each chapter.
• Check Your Understanding—Evaluate your readiness with the end-ofchapter questions that match the style of questions you see in the online course quizzes. The answer key explains each answer.

《網路導論同伴指南 v5.1》是思科®網路學院®CCNA®路由和交換課程中《網路導論》課程的官方補充教材。該課程介紹了互聯網和計算機網路的架構、結構、功能、組件和模型。介紹了IP地址的原則和以太網概念、媒體和操作的基礎，為課程提供了基礎。通過本課程，您將能夠構建簡單的局域網，對路由器和交換機進行基本配置，並實施IP地址方案。

《同伴指南》設計為一本便攜式桌面參考書，可隨時隨地使用，以加強課程中的內容並組織您的時間。

本書的特點幫助您專注於重要概念，以在本課程中取得成功：

- 章節目標：通過回答每章開頭列出的重點問題，複習核心概念。
- 關鍵詞：參考每章中引入並突出顯示的網絡詞彙表。
- 詞彙表：查閱包含250多個術語的全面詞彙表。
- 活動和實驗總結：通過完整列出每章結尾的所有相關練習，最大限度地利用您的學習時間。
- 測試您的理解：通過與在線課程測驗中看到的問題風格相匹配的章末問題，評估您的準備情況。答案解釋了每個答案。