Models for networked computer systems

TCP/IP model

1. The Network Access Layer or Link Layer : hardware
2. The Internet Layer: IP protocols (IPv4 or IPv6.)
3. The Transport Layer: TCP and UDP.
4. The Application Layer: HTTP and HTTPS

OSI model

OSI	TCP/IP
Application Layer	Application Layer HTTP/HTTPS
Presentation Layer	Application Layer HTTP/HTTPS
Session Layer	Application Layer HTTP/HTTPS
Transport Layer	Transport Layer TCP/UDP
Network Layer	Internet Layer IP
Data link Layer	Network Access Layer hardware
Physical Layer	Network Access Layer hardware

TCP

• It is protocols that works with IP to transmit data. It is accuracy.

UDP

• is mainly used for streaming applications
• faster then TCP and it's error-prone

WebSockets

• is more resource-intensive and adds complexity.
• cases:
  • messaging services
  • gaming
  • trading platforms

References

1. System Design Interview Course