"Computer Network" edited by Xie Xiren
After taking the postgraduate entrance examination, I drew some things by myself, and I will record them here
mind Mapping
Architecture
Computer networks can: data communication, resource sharing, distributed processing, improve reliability, load balancing
physical layer
The physical layer can: transmit a binary bit stream
data link layer
The data link layer can: framing, error control, flow control, reliable transmission, media access control
Network layer
The network layer is awesome: heterogeneous network interconnection, routing and forwarding, congestion control
transport layer
The transport layer is also powerful: providing logical communication between processes, demultiplexing, reliable transmission, flow control, and congestion control
application layer
The application layer can: check IP addresses, transfer files, send emails, send and respond to requests in the Internet
