3-way Handshake: A three-step process used in network communications to establish a connection between a client and a server in TCP/IP protocol. The handshake begins when the client sends a SYN (synchronize) packet to the server to request a connection. The server then responds with a SYN-ACK (synchronize-acknowledge) packet to acknowledge the request. Finally, the client sends an ACK (acknowledge) packet back to the server to confirm. Once this process is completed, the TCP connection is established, allowing for data transmission to take place. This handshake is essential for initiating a reliable session between two devices over a network.
Categories: CC D4: Network Security | CCSP D3: Cloud Platform and Infrastructure Security | CISM D4: Incident Management | CISSP D4: Communication and Network Security | Security+ D2: Threats Vulnerabilities and Mitigations | SSCP D6: Network and Communication Security
« Back to Glossary Index