The FREE Cybersecurity Glossary by Thor Pedersen!

SYN Packet: A key component of the TCP/IP protocol's three-way handshake, the SYN packet is sent by a client to initiate a network connection. It requests the establishment of a session by signaling the start of communication. The server responds with a SYN-ACK packet, acknowledging the request, and the handshake is completed when the client replies with an ACK packet.

System Administrator (SA): A professional responsible for the upkeep, configuration, and reliable operation of computer systems, especially multi-user systems like servers. The SA ensures that system hardware, software, and related infrastructure are maintained effectively.

System assets: The physical and logical components of a computer system that are valuable to an organization and require protection. System assets can include hardware, software, data, and networks. They are often identified and protected through the implementation of security policies and controls.

System development: The process of designing, creating, and implementing a new computer system or software application. This can involve requirements gathering, design, coding, testing, and deployment. Examples of system development projects include a new CRM system or a mobile app.

System Development Life Cycle (SDLC): A structured framework that guides the creation and maintenance of systems through stages such as planning, analysis, design, development, testing, deployment, and maintenance to ensure efficiency and alignment with user requirements. It includes models like Waterfall, Agile, and DevOps.

System hardening: The process of strengthening a computer system's security by reducing its attack surface and vulnerabilities. This can involve disabling unnecessary services, applying security patches, and implementing security controls. Examples of system hardening measures include firewalls, intrusion detection systems, and access controls.