PDU - Power Distribution Unit: A device that distributes electric power to multiple devices, often used in data centers., PKI - Public Key Infrastructure: A framework for managing digital certificates and public-key encryption., PoE - Power over Ethernet: A technology that allows electrical power to be transmitted over network cables along with data., PSK - Pre-shared Key: A shared secret used for securing wireless networks, typically used in WPA or WPA2., PTP - Precision Time Protocol: A protocol used to synchronize clocks throughout a computer network with high precision., PTR - Pointer: A type of DNS record that maps an IP address to a domain name, often used in reverse DNS lookups, QoS - Quality of Service: A set of techniques to manage network tra ic and ensure the performance of critical applications., QSFP - Quad Small Form-factor Pluggable: A type of compact, hot-pluggable transceiver used for data communications applications., RADIUS - Remote Authentication Dial-in User Service: A networking protocol that provides centralized authentication, authorization, and accounting for users who connect and use a network service., RDP - Remote Desktop Protocol: A protocol developed by Microsoft that allows a user to connect to another computer over a network., RFID - Radio Frequency Identifier: A technology that uses electromagnetic fields to automatically identify and track tags attached to objects, RIP - Routing Information Protocol: One of the oldest distance-vector routing protocols used to determine the best route for data through a network, RJ - Registered Jack: A standardized physical network interface for connecting telecommunications or networking equipment, RPO - Recovery Point Objective: The maximum acceptable amount of data loss measured in time during a disaster., RSTP - Rapid Spanning Tree Protocol: An enhancement of the Spanning Tree Protocol (STP) that provides faster convergence in a network, RTO - Recovery Time Objective: The target time set for the recovery of IT and business activities after a disaster., RX - Receiver: A device or component that receives data or signals., SaaS - Software as a Service: A cloud computing model that provides software applications over the internet, typically on a subscription basis., SAML - Security Assertion Markup Language: An XML-based standard for exchanging authentication and authorization data between parties, particularly between an identity provider and a service provider., SAN - Storage Area Network: A specialized network that provides access to consolidated, block- level data storage., SASE - Secure Access Service Edge: A network architecture model that combines network security functions with WAN capabilities to support the secure access needs of organizations., SC - Subscriber Connector: A type of fiber optic connector commonly used in data networks., SCADA - Supervisory Control and Data Acquisition: A system used for remote monitoring and control of industrial processes., SDN - Software-defined Network: An approach to networking that uses software-based controllers to manage network resources and services., SD-WAN - Software-defined Wide Area Network: A virtual WAN architecture that allows enterprises to leverage any combination of transport services to securely connect users to applications, SFP - Small Form-factor Pluggable: A compact, hot-pluggable transceiver used in data communications and telecommunication networks., SFTP - Secure File Transfer Protocol: A secure version of FTP that encrypts both commands and data., SIP - Session Initiation Protocol: A protocol used to initiate, maintain, and terminate real-time sessions in IP networks, such as voice and video calls., SIEM - Security Information and Event Management: A solution that provides real-time analysis of security alerts generated by network hardware and applications., SLA - Service-level Agreement: A contract between a service provider and a customer that specifies the level of service expected.,

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