Transport

Retransmission Retransmission is the sending of data again after a loss or failed delivery attempt. It is a reliability mechanism used when initial transmission is not successful. Protocol Return Link Return Link is the communication path carrying traffic from the user or remote side back toward the network or ground side. Protocol RF Engineering RF engineering is the practice of designing and optimizing systems that use radio-frequency energy to carry information or sense the environment. It includes antenna systems, propagation analysis, power budgets, spectrum… Concept/Framework RF Obstruction RF obstruction is a physical condition in which terrain, structures, or other objects interfere with the propagation of radio waves. It degrades link quality by blocking, reflecting, scattering, or absorbing… Concept/Framework ROADM Optical network equipment that adds, drops, or passes through individual DWDM wavelength channels at a network node under remote software control, enabling wavelength routing reconfiguration without manual fiber patching. Hardware Round Trip Time Round Trip Time is the total time required for a signal or packet to travel from a source to a destination and back. It measures end-to-end bidirectional delay. Protocol Route Convergence Route Convergence is the process by which routers in a network reach a consistent view of reachable paths after a topology change. Protocol Route Filtering Route filtering is the policy process of allowing or blocking specific routes based on attributes such as prefix, source, neighbor, or policy rules. Concept/Framework Routing Routing is the network function that computes and maintains paths between sources and destinations. It uses topology, policy, and metrics to choose one or more next hops for traffic. Concept/Framework Routing Protocol A routing protocol is a protocol used by network devices to advertise, learn, and maintain reachability and path metrics. The information it exchanges is used to construct routing tables and… Protocol