An sk_buff contains packet data and also state data that cover multiple layers of the protocol stack.

sk_buff中包含了报文数据，以及涉及协议栈中多个层次的状态数据。

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Achieving low-latency, internet-type data communications requires specially designed packet data channels.

实现低延迟、因特网类型的数据通信需要特别设计分组数据信道。

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Through the interior of the networking stack flow socket buffers (sk_buffs) that move packet data between sources and sinks.

流经网络栈内部的是socket缓冲区(sk_buffs)，它负责在源和汇点之间传递报文数据。

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An internal retractable modem will enable a user to connect with some of the most popular wireless networks today, including Motient's DataTAC, BellSouth's Mobitex and CDPD (Cellular Digital Packet Data).

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And it features what is called mobile Internet protocol (IP), a packet data service that requires users to pay only for the amount of data they send and receive rather than for the amount of time spent on line.

FORBES: Down To Earth

Besides lacking a camera, WiFi, GPS and even music playback (obviously), there's no color display, WAP browser, email client or T9 predictive text (which all came with the T68i), and no GPRS packet data or built-in Bluetooth (which both arrived with the T39).

ENGADGET: Ericsson T28z review Mobile