Prerequisites

• Session
  • HTTP is a stateless protocol
    • It does not determine whether requests are from the same client
  • A series of communications from connection establishment to disconnection

Stateful

• The server maintains the client's session state
• The system retains state and data
• Examples of protocols
  • FTP, TCP, BGP, OSPF, EIGRP, SMTP, SSH

Stateless

• The server does not maintain the client's session information
• The system does not retain state or data, determines output from input values
• Examples of protocols
  • HTTP, UDP, IP, DNP

References

• What does Stateless and Stateful mean
• Differences between Stateful and Stateless
• Session State