Mastering Linux Networking Commands: A Comprehensive Guide
Understanding TCP/IP Protocol Stack Although the Open Systems Interconnection (OSI) model provides a conceptual and structured way to understand network communication. The TCP/IP protocol stack is the foundation of modern networking and serves as the backbone for communication on the internet. Imagine you want to message a friend who lives far away. To make sure your message reaches them correctly, the internet defines a set of rules and steps your message must follow. The rules here refer to the TCP/IP protocol. The TCP/IP protocol stack consists of four layers, each serving a specific purpose in the transmission of data across a network. Let’s clarify each layer in the stack: Application Layer : The topmost layer of the TCP/IP stack, responsible for application-level protocols such as HTTP, FTP, and SMTP. Transport Layer : Ensures data delivery across the network. The two key protocols at this layer are TCP (Transmission Control Protocol) and UDP (User D...