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Network Communication

Network Communication: The exchange of data between systems over network protocols and connections. Secure use depends on clear boundaries, correct configuration, monitoringMonitoringThe continuous observation of systems, identities, networks, and controls for relevant changes., and a controlled lifecycle.

How it works and where it fits

Network Communication concerns communication between systems and therefore addressing, protocol state, trust boundaries, and reachable services. Security analysis must look beyond individual packets to direction, session, identity, encryption, and intended purpose. Different network layers introduce their own controls, assumptions, and failure modes.

Practical security relevance

Communication paths should be documented, unnecessary connections prevented, and permitted flows defined as narrowly as practical. Segmentation, secure protocols, authentication, and logging reinforce one another. Monitoring should cover known signatures as well as unusual destinations, volumes, and timing; rule and topology changes belong in a controlled process.

  • Internet ProtocolInternet ProtocolFundamental protocol for addressing and forwarding packets within networks.: Fundamental protocol for addressing and forwarding packets within networks.
  • Network FlowNetwork FlowSummary of a communication relationship between endpoints over a specific period.: Summary of a communication relationship between endpoints over a specific period.
  • Transport Layer SecurityTransport Layer SecurityProtects network connections through encryption, authentication, and integrity checks.: Protects network connections through encryption, authentication, and integrity checks.
  • FirewallFirewallControls network traffic based on defined rules and security policies.: Controls network traffic based on defined rules and security policies.

Related terms