3..All of them are linked to the central unit either by point-to-point or multidrop cable lines.This central unit may be a host computer or a file server.
环形络也没有主机,每个机器都和其他两台机器互相接,形成一个环形。
4.Still, unless rates are linked to the level of demand, much of the benefit of smart grids will fail to materialise, says Mr Faruqui of the Brattle Group.