Now that we've seen how network interactions are executed down to the lowest level, we need to understand how those interactions can be secured for users. One of the most fundamental aspects of the public Internet is the ability to secure certain interactions between two hosts. In this chapter, we'll explore how that's done. We'll start by looking at the underlying security mechanisms that supported the original Secure Sockets Layer (SSL), which was the standard for secured network interactions for decades. Then, we'll take a close look at its successor, Transport Layer Security (TLS), and consider some of the reasons for the transition. Finally, we'll see how both of these mechanisms are intended to provide secure interactions between network hosts by implementing our own simulation of the protocol. In doing so, we'll...
Hands-On Network Programming with C# and .NET Core
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Hands-On Network Programming with C# and .NET Core
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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.
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Current Title:
Hands-On Network Programming with C# and .NET Core
Table of Contents (26 chapters)
Preface
Free Chapter
Section 1: Foundations of Network Architecture
Networks in a Nutshell
DNS and Resource Location
Communication Protocols
Packets and Streams
Section 2: Communicating Over Networks
Generating Network Requests in C#
Streams, Threads, and Asynchronous Data
Error Handling over the Wire
Section 3: Application Protocols and Connection Handling
Sockets and Ports
HTTP in .NET
FTP and SMTP
The Transport Layer - TCP and UDP
Section 4: Security, Stability, and Scalability
The Internet Protocol
Transport Layer Security
Authentication and Authorization on Networks
Caching Strategies for Distributed Systems
Performance Analysis and Monitoring
Section 5: Advanced Subjects
Pluggable Protocols in .NET Core
Network Analysis and Packet Inspection
Remote Logins and SSH
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