all cards contain one or more lan or wan ports; a forwarding table, which is a simplified version of the full route table; the qbrt hardware; packet-forwarding hardware; buffering capacity; and separate interfaces to the route manager and the switch engine on the control board 所有卡都包括:一个或多个局域网或广域网端口、一个转发表(即完整路由表的简化版)、qbrt硬件、包转发硬件、缓存容量以与控制板上路由管理器和开关引擎独立的接口。