Network

1 · Chuangcius · Feb. 28, 2023, 5:47 a.m.
1. TCP/IP encapsulation How is data sent over the network? Why do we need so many layers in the OSI model? The diagram below shows how data is encapsulated and de-encapsulated when transmitting over the network. Step 1: When Device A sends data to Device B over the network via the HTTP protocol, it is first added an HTTP header at the application layer. Step 2: Then a TCP or a UDP header is added to the data. It is encapsulated into TCP segments at the transport layer. The header contains th...