网卡有10M,10M/100M,100M,1000M. 网线有3类(10M)、5类(100M)、超5类线(155M)、6类线(255M).. 网卡有10M,10M/100M,100M,1000M. 网线有3类(10M)、5类(100M)、超5类线...