Book Image

Hands-On Network Programming with C# and .NET Core

By : Sean Burns
Book Image

Hands-On Network Programming with C# and .NET Core

By: Sean Burns

Overview of this book

The C# language and the .NET Core application framework provide the tools and patterns required to make the discipline of network programming as intuitive and enjoyable as any other aspect of C# programming. With the help of this book, you will discover how the C# language and the .NET Core framework make this possible. The book begins by introducing the core concepts of network programming, and what distinguishes this field of programming from other disciplines. After this, you will gain insights into concepts such as transport protocols, sockets and ports, and remote data streams, which will provide you with a holistic understanding of how network software fits into larger distributed systems. The book will also explore the intricacies of how network software is implemented in a more explicit context, by covering sockets, connection strategies such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), asynchronous processing, and threads. You will then be able to work through code examples for TCP servers, web APIs served over HTTP, and a Secure Shell (SSH) client. By the end of this book, you will have a good understanding of the Open Systems Interconnection (OSI) network stack, the various communication protocols for that stack, and the skills that are essential to implement those protocols using the C# programming language and the .NET Core framework.
Table of Contents (26 chapters)
Free Chapter
Section 1: Foundations of Network Architecture
Section 2: Communicating Over Networks
Section 3: Application Protocols and Connection Handling
Section 4: Security, Stability, and Scalability
Section 5: Advanced Subjects


We covered a lot in this chapter, while managing to focus on a rather narrow subject. We started by taking a high-level view of the necessary steps to secure communications between two hosts over an open network. Then, we looked at how each of those steps is implemented (conceptually, at least). First, we looked at the process of verifying the identity of the host you want to interact with. We learned about trusted certificate authorities, and learned how they are leveraged by web clients to validate the identity of a server by examining a signed, cryptographic certificate.

In exploring this topic, we also considered how much trust must be placed in these CAs, and how that level of trust opens the wider public up to an incredibly high level of risk if it is ever violated. We also learned why a CA is necessary to validate a server identity, but is not necessary to validate...