53 7.4.2 控制封包(control frames ) 7.4 封包的种类(续) 控制封包用于辅助资料封包的 传送,管理无线介质的存取。
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从数 据链路层看WLAN 有三种帧类型:管理帧(Management Frames)、控制帧 (Control Frames)和数据帧 (Data Frames)。这些帧的任何操作都直接或潜在地威胁着数据机 密性、完整性、认证性和可用性。
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Most of the rate adaptation algorithms are about the data frame rate. However, the rate adaptation algorithm about the control frames is still very rare.
但目前绝大部分速率自适应算法是针对数据帧的速率进行自适应,而针对控制帧的速率自适应算法还很少见。
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The camera also includes features that should appease more-advanced users, such as a dedicated mode dial, a versatile lens ring control, a top ISO sensitivity of 25, 600 and a 6 frames-per-second burst mode.
ENGADGET: Casio joins the self-portrait LCD ranks with the ��350 Exilim EX-ZR1000, we go hands-on (video)
They end up bent double, on zimmer frames, with pain, particularly pelvic fractures which are almost impossible to control in terms of pain.
BBC: Breakfast with Frost
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