Traditional Internet access methods like dial-up were so slow that host computers were connectedto the dial-up （ ） at the customer premise over slow （ ） ports. （2007年下半年网络工程师上午真题解析）
Traditional Internet access methods like dial-up were so slow that host computers were connectedto the dial-up （ ） at the customer premise over slow （ ） ports. （2007年下半年网络工程师上午真题解析）
A、buffer
B、modem
C、computer
D、server
A、parallel
B、digital
C、serial
D、variable
参考答案：B、C
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