Endpoint and exit IP
Endpoint is the host and port your application connects to. Exit IP is the network address visible to the destination. Multiple sessions may share an exit, and one endpoint may route through different exits. Neither endpoint count nor session count proves a unique-IP count.
Entitlement and allocation
An entitlement records what a customer is permitted to use under a purchased plan. An allocation binds actual provider resources to that service. A plan name alone does not prove successful provisioning; active state and verified connection matter.
Protocol, CONNECT and authentication
Protocol describes communication with the proxy. CONNECT establishes a tunnel, often for HTTPS. Authentication proves access with supported credentials or an allowed source IP. TLS protects a connection and verifies certificates; it is distinct from proxy identity.
Geo, ASN and carrier
Geo targeting requests a supported location. ASN identifies an autonomous network. Carrier refers to a mobile network operator. These dimensions are not interchangeable, and support for one does not establish support for another.
Sticky, rotation and concurrency
Sticky asks to retain an exit for a period; strict affinity explicitly forbids silent replacement. Rotation changes an exit under service-defined rules. Concurrency is the number of simultaneous operations, distinct from requests per second or total sessions.
Usage, overage and synthetic traffic
Usage is an observation with a source, time and unit. Overage is a commercial charge beyond an allowance. A budget estimate is not a technical cutoff. Synthetic traffic is intentionally generated test activity that should be marked and excluded from business analytics.