PPP was designed to rundirectly over these serial links. But with the advent of broadband Internet （ ） technologiessuch as ADSL and cable modems there has been a considerable increase in the bandwidth
PPP was designed to rundirectly over these serial links. But with the advent of broadband Internet （ ） technologiessuch as ADSL and cable modems there has been a considerable increase in the bandwidth delivered tothe end users. （2007年下半年网络工程师上午真题解析）
A、access
B、cache
C、cast
D、storage
参考答案：A
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