What is routing?什麼是路由？
Routing is the process of moving packets through an internetwork, such as the Internet.路由過程是移動數據包通過互聯網，因特網等。
Routing actually consists of two separate, but related, tasks:路由其實兩個單獨的，但相互關聯的工作：
- Defining paths for the transmission of packets through an internetwork.確定路徑用於傳輸數據包，通過互聯網。
- Forwarding packets based upon the defined paths.轉發數據包根據所定義的路徑。
Routing vs. Bridging and Switching路由與橋接與交換
Routing is distinguished from bridging or switching by operating at the Network Layer of the OSI Model .路由是有別於縮小或切換操作，在網絡層的OSI模型 。 Bridging and switching occur on the Data Link Layer .橋接與交換發生在數據鏈路層 。
Static vs. Dynamic Routing靜態與動態路由
Routing can be accomplished by manually entering the information necessary for packets to reach any part of the internetwork into each router.路由可以通過手動輸入所需資料，數據包到達任何部分的互聯網進入每一個路由器。 This is called static routing .這就是所謂的靜態路由 。
Static routing works reasonably well for very small networks, but does not scale well.靜態路由工程頗為順利，為非常小的網絡，但並沒有大規模的。 When using static routing, the routing tables on each router must be updated each time the network topology changes -- such as when a network link fails..當使用靜態路由， 路由表，對每一個路由器必須更新，每次網絡的拓撲結構改變-例如當一個網絡連接失敗. .
In most networks, routing is managed automatically through the use of dynamic routing.在大多數網絡中，路由管理，自動通過使用動態路由。 In dynamic routing, routing protocols create and maintain the routing tables automatically.在動態路由， 路由協議的創建和維護路由表自動。 Dynamic routing responds much more quickly to network changes (and network failures) than static routing.動態路由的反應更為迅速，以網絡的變化（和網絡故障） ，比靜態路由。
Books on Routing書籍路由
 Routing TCP/IP Volume I 路由的TCP / IP I卷 | This all-encompassing TCP/IP text defines completeness with its one-thousand-plus pages and hundreds of configuration screens, exercises, charts, tables, and references.這個涵蓋一切的TCP / IP的文本界定完整性與它的一個一千多頁，數百人的設定畫面，練習，圖表，表格和參考作用。 Though initially overwhelming, such thoroughness is what's demanded of those who ultimately pass the Cisco Certified Internetwork Expert (CCIE) exam, the bruising test for which Routing TCP/IP, Volume 1 serves as preparatory material.儘管最初壓倒性的，這種徹底性是什麼的，要求那些最終通過了思科認證互聯網專家（ ccie ）考試，瘀傷考驗，其中路由TCP / IP協議，第1卷，作為籌備材料。 Such a goal is evidenced in much of the three-part book's design.這樣一個目標就是明證，在大部分的三個部分，這本書的設計。 For example, nearly every chapter includes some combination of recommended readings, review questions, configuration and troubleshooting exercises, case studies, and summaries.舉例來說，幾乎每個章節包括一些組合推薦讀，檢討問題，配置和故障排除演練，案例研究，並總結。 In addition, there are numerous appendices devoted to answers to questions and exercise solutions as well as one that outlines exam preparation tips.此外，還有眾多的附錄專門回答問題，並行使解決方案，以及一，概述考試準備一些小竅門。 Doyle begins this volume with a review of several basic topics, including a chapter that outlines the parameters of TCP/IP itself.杜可風始於本卷作一個回顧幾個基本課題，包括一章概述了參數的TCP / IP協議本身。 Though some may already be familiar with that material, the sections on dynamic and static routing serve as valuable review material for readers of all levels.雖然有些人可能已經熟悉的物質，該路段上的動態和靜態路由，作為寶貴的檢討材料，為讀者的各個層次。 The second part deals with TCP/IP interior routing protocols, such as Routing Information Protocol (RIP), Interior Gateway Routing Protocol (IGRP), and Open Shortest Path First (OSPF).第二部分涉及的TCP / IP內部路由協議，例如路由信息協議（已故） ，內部網關路由協議（ igrp ） ，並開放最短路徑優先（ OSPF功能） 。 The book ends on a challenging note with explanations of route redistribution, route filtering, and the like.這本書完就一個具有挑戰性的說明與解釋路線的重新分配，線路濾波等。 Routing TCP/IP is required reading for those readers with the ambitious goal to both understand the protocol and excel on the CCIE exam.路由TCP / IP的，是需要讀那些讀者與遠大的目標，以了解這兩個議定書和Excel對ccie考試。 |
 IP Routing Fundamentals IP路由基本面 | A comprehensive ntroduction to routing concepts and protocols in IP networks.Comprehensive review of the operational mechanics of today's leading routing protocols, including IGRP, EIGRP, OSPF, RIP, and RIP-2.全面簡介路由概念和議定書，在IP networks.comprehensive審查業務技工今天的領先路由協議，其中包括igrp ， eigrp ， OSPF功能，擷取和RIP - 2 。 Detailed explanation of IP addressing, including classful and classless addresses, subnetting, supernetting, Classless Interdomain Routing (CIDR), and Variable Length Subnet Masks (VLSM)Side-by-side comparisons of various LAN segmentation technologies, including bridges, switches, and routersExploration of how routers are used to build wide area networksExamination of the future of routing, including IPv6, next generation routing protocols, host-based routing, and IP SwitchingIP Routing Fundamentals is the definitive introduction to routing in IP networks.詳細的解釋， IP地址，包括classful和無類別的地址， subnetting ， supernetting ，無類別域間路由（ CIDR ） ，和可變長度子網面罩（ vlsm ）並排比較各種局域網分割技術，其中包括橋樑，交換機和routersexploration如何路由器是用來建立廣域networksexamination對未來的路由，包括IPv6 ，下一代路由協議，基於主機的路由和IP路由switchingip基本面絕對是介紹路由IP網絡。 This comprehensive tome explores the mechanics of routers, routing protocols, network interfaces, and operating systems.這項綜合性托梅探討力學的路由器，路由協議，網絡接口，以及作業系統。 This reference provides essential background information for network professionals who are deploying and maintaining LANs and WANs, as well as IT managers who are seeking information on how evolving internetworking technology will affect future networks.本參考提供必要的背景資料，為網絡專業人士部署和維護局域網和廣域網，以及IT經理們正在尋求信息，就如何演變互聯科技，將影響到未來的網絡。 Part I discusses the many roles routers play in networks, Part II talks about the inner working of routers, Part III works with the operational issues of routing protocols, and Part IV addresses implementation issues that provide practical insight, in addition to a discussion of the future of routing.第一部分論述了許多角色扮演的路由器在網絡中，第二部分談黨內工作的路由器，第三部分工程與業務問題的路由協議，和第四部分針對執行問題提供實際的洞察力，除了討論各種未來的路由。 |
 Teach Yourself Routing in 24 Hours 教導自己的路由在24小時內 | Learn routing in the most efficient, enjoyable way possible with Sams Teach Yourself Routing in 24 Hours.學習路由的最有效，最愉快的方式與可能因噎廢食教導自己的路由在24小時以上。 Book presents routing concepts in a vendor-neutral presentation.書中介紹了路由的概念，在一個供應商中立的陳述。 The book is full of insight from the author's extensive knowledge and experience.這本書是充滿洞察力，從作者的廣泛的知識和經驗。 Each lesson is designed to build upon previous lessons, but many can be read separately, thus providing the reader with a tutorial for routing basics as well as a means of learning about a particular routing concept quickly.每一堂課，是旨在建立後，以前的經驗教訓，但很多人可以讀分開，從而提供讀者一個補習路由的基本知識，以及作為一種手段，了解某一特定路由的概念迅速。 Sams Teach Yourself Routing in 24 Hours presents routing fundamentals in twenty-four easy to follow lessons that build upon the previous lessons.因噎廢食教導自己的路由在24小時內給出路由基本面，在2004年很容易遵循的教訓，借鑒以往的經驗教訓。 Each of these lessons could stand alone as a tutorial on a particular routing concept thereby adding greater value to the book.每個這些教訓，可以單獨作為一個補習對某一特定路由的概念，從而加入更大的價值，以這本書。 In additional to these "easy to follow" lessons, this book is full of useful notes, tips, and cautions from the author's extensive experience that will prove invaluable to anyone who wants to learn routing as quickly as possible.除了這些"容易跟進"的經驗教訓，這本書是充滿有用的筆記，秘訣，及注意事項等，由作者豐富的經驗，這將證明是非常寶貴的，以任何人想學習路由盡快好起來。 The reader will also benefit from the exercises (each one based on an actual experience the author has encountered) at the end of each chapter.讀者也將受益於這次演習（每一個基於實際經驗，筆者遇到了） ，在每章結尾。 |
Bookmark What is routing?書籤什麼是路由？
