Digital vs Interconnect Cables - Difference?

Can someone explain the difference between digital and interconnect cables? Are they inter-changable? Is digital for connecting CD/SACD transport and DAC?

How about the cables between CD player and pre-amp - Interconnect or digital cables? And between pre-amp and power-amp? Are the same type of interconnect cables?

Also, how many types of interconnect cables are availabe in the market? Digitals - with various connection options?

Thanks.