Patterns in Network Architecture: A Return to Fundamentals(harcover)

Groundbreaking Patterns for Building Simpler, More Powerful Networks

In Patterns in Network Architecture, pioneer John Day takes a unique approach to solving the problem of network architecture. Piercing the fog of history, he bridges the gap between our experience from the original ARPANET and today’s Internet to a new perspective on networking. Along the way, he shows how socioeconomic forces derailed progress and led to the current crisis.

Beginning with the seven fundamental, and still unanswered, questions identified during the ARPANET’s development, Patterns in Network Architecture returns to bedrock and traces our experience both good and bad. Along the way, he uncovers overlooked patterns in protocols that simplify design and implementation and resolves the classic conflict between connection and connectionless while retaining the best of both. He finds deep new insights into the core challenges of naming and addressing, along with results from upper-layer architecture. All of this in Day’s deft hands comes together in a tour de force of elegance and simplicity with the annoying turn of events that the answer has been staring us in the face: Operating systems tell us even more about networking than we thought. The result is, in essence, the first “unified theory of networking,” and leads to a simpler, more powerful–and above all–more scalable network infrastructure.  The book then lays the groundwork for how to exploit the result in the design, development, and management as we move beyond the limitations of the Internet.

Using this new model, Day shows how many complex mechanisms in the Internet today (multihoming, mobility, and multicast) are, with this collapse in complexity, now simply a consequence of the structure. The problems of router table growth of such concern today disappear. The inescapable conclusion is that the Internet is an unfinished demo, more in the tradition of DOS than Unix, that has been living on Moore’s Law and 30 years of band-aids. It is long past time to get networking back on track.

•           Patterns in network protocols that synthesize “contradictory” approaches and simplify design and implementation

•           “Deriving” that networking is interprocess communication (IPC) yielding

•           A distributed IPC model that repeats with different scope and range of operation

•           Making network addresses topological makes routing purely a local matter

•           That in fact, private addresses are the norm–not the exception–with the consequence that the global public addresses required today are unnecessary

•           That mobility is dynamic multihoming and unicast is a subset of multicast, but multicast devolves into unicast and facilitates mobility

•           That the Internet today is more like DOS, but what we need should be more like Unix

•           For networking researchers, architects, designers, engineers

Provocative, elegant, and profound, Patterns in Network Architecture transforms the way you envision, architect, and implement networks.

Preface: The Seven Unanswered Questions xiii

Chapter 1: Foundations for Network Architecture 1

Chapter 2: Protocol Elements 23

Chapter 3: Patterns in Protocols 57

Chapter 4: Stalking the Upper-Layer Architecture 97

Chapter 5: Naming and Addressing 141

Chapter 6: Divining Layers 185

Chapter 7: The Network IPC Model 235

Chapter 8: Making Addresses Topological 283

Chapter 9: Multihoming, Multicast, and Mobility 317

Chapter 10: Backing Out of a Blind Alley 351

Appendix A: Outline for Gedanken Experiment on Separating Mechanism and Policy 385

Bibliography 389

Index 399

《網路架構中的模式》是一本開創性的書籍，旨在建立更簡單、更強大的網路。作者約翰·戴以獨特的方式解決了網路架構的問題。他通過穿越歷史的迷霧，將我們從最初的ARPANET到今天的互聯網的經驗連接起來，提供了一個新的網路視角。在這一過程中，他展示了社會經濟力量如何阻礙了進步，並導致了當前的危機。

《網路架構中的模式》從ARPANET開發過程中確定的七個基本問題開始，回到了基礎，追溯了我們的經驗，包括好的和壞的方面。在這一過程中，他發現了在協議中被忽視的模式，這些模式可以簡化設計和實現，解決了連接和無連接之間的經典衝突，同時保留了兩者的優點。他對命名和地址核心挑戰的深入洞察，以及上層架構的結果，都為我們提供了新的見解。在戴的巧妙手法下，所有這些都結合在一起，形成了一個優雅而簡潔的力作，令人討厭的是，答案一直就在我們面前：操作系統告訴我們的關於網路的東西比我們想像的還要多。結果，本質上形成了第一個“網路統一理論”，並導致了一個更簡單、更強大，最重要的是更可擴展的網路基礎設施。然後，這本書為我們如何在設計、開發和管理中利用這一結果奠定了基礎，超越了互聯網的限制。

使用這個新模型，戴展示了當今互聯網中的許多複雜機制（多宿、移動性和組播）現在只是結構的一個結果，復雜性已經消失。如今令人擔憂的路由表增長問題也消失了。無可避免的結論是，互聯網是一個未完成的演示，更像是DOS而不是Unix，它一直依賴著摩爾定律和30年的臨時措施。是時候重新將網路發展回正軌了。

本書還介紹了一些網路協議中綜合了“矛盾”方法並簡化設計和實現的模式，以及將網路視為進程間通信（IPC）的“推導”，並提供了不同範圍和操作方式的分佈式IPC模型。將網路地址設置為拓撲使得路由純粹成為一個本地問題。事實上，私有地址是常態，而不是例外，這意味著當今所需的全球公共地址是不必要的。移動性是動態多宿，單播是組播的一個子集，但組播退化為單播並促進了移動性。如今的互聯網更像是DOS，但我們需要的應該更像Unix。本書適合網路研究人員、架構師、設計師和工程師閱讀。

《網路架構中的模式》引人思考，優雅而深刻，改變了您對網路的想像、架構和實現方式。