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RHN Classic, RHSM, and Satellite

There are some conceptual differences between Red Hat Subscription Management and RHN Classic, and this translates into differences in the way that subscriptions are defined. In older subscription models — the model used by RHN Classic and Satellite 5 — a system required channel entitlements which granted access to sets of content and software – well known as channels.

Red Hat Subscription Management and Satellite 6 uses public-key infrastructure (PKI) certificates to uniquely identify the system, the products on the system, and its attached subscriptions.