Introduction
簡介
You are a network engineer and your old professor rings you up with a request. He needs an expert to teach his students about the TCP/IP transport layer and application layer. He believes your hands-on experience will help them understand these important network layers better and prepare them for real-world challenges. This is your chance to share your knowledge and experience with future network engineers.
你是一位網路工程師，你以前的教授打電話來請你幫忙。他需要一位專家向他的學生講解 TCP/IP 傳輸層與應用層。他相信你的實務經驗能幫助學生更加理解這些重要的網路層，並為他們日後面對真實世界的挑戰做好準備。這是你與未來的網路工程師分享知識與經驗的機會。
You are made aware that:
你了解到以下情況：
- Students might not understand the role of TCP/IP or how it works.學生可能不了解 TCP/IP 的角色或其運作方式。
- There is a gap between what students learn in theory and how it works in practice, and that is also probably true with TCP and UDP protocols.學生在理論上所學的內容與實際運作之間存在落差，這在 TCP 與 UDP 協定上也可能同樣如此。
- Many students do not know how to configure and troubleshoot real-world application layer protocols like HTTP, Domain Name System (DNS), and DHCP, which are crucial for smooth network operations.許多學生不知道如何設定與疑難排解真實世界的應用層協定，例如 HTTP、網域名稱系統（DNS）與 DHCP，而這些對於網路順利運作至關重要。
How do the different functions of the application and transport layer contribute to the overall process of network communication? You will explore these two layers.
應用層與傳輸層的不同功能，如何共同促成網路通訊的整體流程？你將探索這兩個層。
In this course, you will learn how:
在本課程中，你將學到如何：
- The TCP/IP transport layer handles communication between applications on different devices.TCP/IP 傳輸層如何處理不同裝置上應用程式之間的通訊。
- To differentiate between TCP and UDP, and when to use each.如何區分 TCP 與 UDP，以及各自適用的時機。
- Key application layer protocols like HTTP, DNS, and DHCP, and their roles in network functionality.關鍵應用層協定，例如 HTTP、DNS 與 DHCP，以及它們在網路功能中的角色。
- To use diagnostic tools to inspect and analyze TCP/IP applications on network devices.如何使用診斷工具檢查與分析網路裝置上的 TCP/IP 應用程式。