Internet Protocol

Internet Protocol: Fundamental protocol for addressing and forwarding packets within networks. The control applies to network communicationNetwork CommunicationThe exchange of data between systems over network protocols and connections. or network accessNetwork AccessThe ability of a user, device, or workload to connect to and use network resources.. Effectiveness is achieved through restrictive rules, segmentation, continuous monitoringMonitoringThe continuous observation of systems, identities, networks, and controls for relevant changes., and coordinated response processesResponse ProcessA coordinated sequence of decisions and actions for handling security events and incidents..

How it works and where it fits

Internet Protocol 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.

Related concepts

• IPsecIPsecProtocol family for the authentication and encryption of IP communication.: Protocol family for the authentication and encryption of IP communication.
• Network FlowNetwork FlowSummary of a communication relationship between endpoints over a specific period.: Summary of a communication relationship between endpoints over a specific period.
• FirewallFirewallControls network traffic based on defined rules and security policies.: Controls network traffic based on defined rules and security policies.
• Network SegmentationNetwork SegmentationSeparates network segments to control access and limit lateral movement.: Separates network segments to control access and limit lateral movement.