Название: Computer Networks and the Internet: A Hands-On Approach
Автор: Gerry Howser
Издательство: Springer
Год: 2020
Страниц: 555
Язык: английский
Формат: pdf (true)
Размер: 10.1 MB

The goal of this textbook is to provide enough background into the inner workings of the Internet to allow a novice to understand how the various protocols on the Internet work together to accomplish simple tasks, such as a search. By building an Internet with all the various services a person uses every day, one will gain an appreciation not only of the work that goes on unseen, but also of the choices made by designers to make life easier for the user.

Each chapter consists of background information on a specific topic or Internet service, and where appropriate a final section on how to configure a Raspberry Pi to provide that service.

While mainly meant as an undergraduate textbook for a course on networking or Internet protocols and services, it can also be used by anyone interested in the Internet as a step–by–step guide to building one's own Intranet, or as a reference guide as to how things work on the global Internet

The first part of the book, The IP Network, will give the reader some background into how devices communicate and the importance of the Physical Layer, the Data Link Layer, and the Network Layer of communications. Great care has been taken to approach these layers from a non–vendor specific viewpoint. In addition, the reader should get a feel for why corrupted packets can be dropped without dealing with the impact on the transfer of information. One of the upper layers, the Transport Layer, must deal with missing packets, not the network.

The second part of the book, The Router, explains the two main functions of a router and how they are accomplished. As in Part 1, the viewpoint is non-vendor specific and treats all routable protocols as equal. The emphasis is on how the router moves packets from known network to known network, not as much on how the router knows these networks.

The third part of the book, Dynamic Networks, covers the true heart of the Internet and how networks deal with the fact that everything changes on the Internet. Even rather small networks such as the Laboratory Network of Raspberry Pi microcomputers can be too complex for network administrators to easily handle. Only by using a routing protocol to dynamically learn the network can one hope to have a working, resilient network of any size.

The last part of this book, Internet Services, is an exploration of some of the most common services provided by the Internet and a few that are not as common but interesting to explore such as Telnet.