Concorde class offers expedited data delivery. Ostriches are an alternate carrier that have much greater bulk transfer capability but provide slower delivery, and require the use of bridges between domains. One implementation strategy is for a bar-code reader to scan each carrier as it enters the router and then enqueue it in the proper queue, gated to prevent exit until the proper time. The carriers may sleep while enqueued. For secure networks, carriers may have classes Prime or Choice.
Prime carriers are self-keying when using public key encryption.
Some distributors have been known to falsely classify Choice carriers as Prime. Packets MAY be marked for deletion using RED paint while enqueued. Carriers in the queue too long may leave log entries, as shown on the scale. The following is a plot of traffic shaping, from coop-erative host sites. Avian carriers normally bypass bridges and tunnels but will seek out worm hole tunnels.