TCP/IP Protocol

In this paper, through the in-depth study of TCP/IP protocol stack principles and ideas, combined with the actual situation of embedded devices, the existing TCP/IP is cut out, and by using the layered, modular design the specific implementation of the embedded TCP/IP protocol stack is described in detail. The implementation scheme is simple, easy to operate, so it has high practical value.The TCP/IP protocol suite serves as the fundamental architecture for global data communication and forms the core framework of the modern Internet. As a layered and interoperable model, TCP/IP integrates key protocols—most notably the Transmission Control Protocol (TCP) and the In- ternet Protocol (IP)—to support reliable data transfer, logical addressing, routing, and congestion control across heterogeneous networks. This review examines the evolution, architectural design, functional mechanisms, and performance considerations of the TCP/IP suite. Emphasis is placed on the reliability features of TCP, the scalability of IP addressing, and the interaction of upper-layer and lower-layer protocols within the stack. The paper also analyzes contemporary challenges, including security vulner- abilities, IPv4 exhaustion, Quality of Service (QoS) limitations, and the transition toward IPv6. Overall, this review highlights the continued relevance, robustness, and adaptability of the TCP/IP model in supporting modern networked systems and emerging Internet technologies.