Core Network

Routing Metric A routing metric is a numeric or rule-based measure used by a routing system to evaluate and compare paths. It helps determine which route should be preferred when more than… Concept/Framework Routing Policy Routing policy is the set of administrative rules that govern how routing information is processed, filtered, modified, and selected. It defines which paths are preferred and which advertisements are permitted. Concept/Framework Routing Table Routing Table is the stored set of destination prefixes, next hops, and related forwarding information used by a router or host. It drives forwarding decisions. Software Segment Routing Segment Routing is a source-routing approach in which a packet carries an ordered list of instructions that guide how the network forwards it. It encodes path behavior in segments. Protocol Service Degradation Service Degradation is a reduction in the performance, quality, or reliability of a service without a complete outage. The service still operates but at reduced quality. Operations Shortest Path First Shortest Path First is a routing approach that selects the shortest or lowest-cost route through a network graph by computing the minimum-cost path from available topology and metric information. Protocol Split Horizon Split Horizon is a routing rule that prevents a router from advertising a route back out of the same interface or direction from which the route was learned. Protocol Static Routing Static routing is a routing method in which routes are explicitly configured by an operator rather than learned through a routing protocol. The router forwards traffic according to those fixed… Concept/Framework Subnet A subnet is a portion of a network’s address space that has been divided into a smaller routable segment. It is used to group hosts, control traffic, and simplify administration. Concept/Framework Subnet Mask Subnet Mask is a bitmask used to separate the network and host portions of an IP address in IPv4 and similar address structures. It defines the subnet boundary. Protocol