TCP/IP Socket Programming in C# .NET — Lesson 1: Networking Foundations and .NET Socket APIs

Learning Objectives

• Explain TCP/IP layers, addresses, ports, DNS, sockets, connections, and client-server roles
• Use C# and .NET networking classes to create and configure sockets
• Plan message formats, connection lifecycle, timeouts, and error behavior

Detailed Topics

• Explain TCP/IP layers: Explain TCP/IP layers, addresses, ports, DNS, sockets, connections, and client-server roles
• Use C# and .NET networking classes to create and configure sockets: Use C# and .NET networking classes to create and configure sockets
• Plan message formats: Plan message formats, connection lifecycle, timeouts, and error behavior

Guided Demonstration

1. Review the requirement, environment, dependencies, roles, risks, and expected outcome.
2. Demonstrate the relevant configuration, analysis, code, or administration workflow step by step.
3. Capture settings, outputs, logs, screenshots, calculations, or test evidence.
4. Compare the observed result with the stated acceptance criteria.

Hands-On Activity

Create a small TCP client and server that establish and close a controlled connection.

• Document assumptions and the planned sequence before making changes.
• Complete the activity and preserve evidence of normal and exception behavior.
• Record issues, corrective actions, and reusable operational or development notes.

Troubleshooting Focus

• Separate symptoms from causes and collect evidence before applying a fix.
• Check configuration, permissions, data, dependencies, capacity, connectivity, and recent changes.
• Validate rollback, recovery, support ownership, and user or business impact.

Validation Checklist

• The requirement and expected outcome are clear.
• The selected configuration, design, query, code, or process is documented.
• Normal, boundary, failure, security, and operational conditions are reviewed.
• The result is supported by evidence and the next improvement is prioritized.

Lesson Outcome

Learners can explain and apply Networking Foundations and .NET Socket APIs in a realistic scenario and validate the result with documented evidence.