计算机英语习题PPP was clearly designed to be implemented in software,not in hardware as HDLC nearly always is.With a software implementation,working entirely with bytes is much simpler than working with individual bits.In addition,PPP was desi

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计算机英语习题PPP was clearly designed to be implemented in software,not in hardware as HDLC nearly always is.With a software implementation,working entirely with bytes is much simpler than working with individual bits.In addition,PPP was desi
计算机英语习题
PPP was clearly designed to be implemented in software,not in hardware as HDLC nearly always is.With a software implementation,working entirely with bytes is much simpler than working with individual bits.In addition,PPP was designed to be used with modems,and modems accept and transmit data in units of 1 byte,not 1 bit.
这个答案原题是：PPP基本上以HDLC为基础.HDLC使用了位填充技术来防止在净荷数据中偶尔出现标志字节,以避免混淆.请给一个理由说明为什么PPP却使用了字节填充技术!

计算机英语习题PPP was clearly designed to be implemented in software,not in hardware as HDLC nearly always is.With a software implementation,working entirely with bytes is much simpler than working with individual bits.In addition,PPP was desi
PPP 显然是用于软件的操作,不像HDLC等基本上是用于硬件.通过使用这种软件,相对于单个字节的操作来说工作就简单多了.另外,PPP还可以用于调制解调器,调制解调器接受和传输数据是以每字节为单位的,而不是像过去的二进制那样以比特即位作为传输单位.

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