下列哪些是M600的特点（）。

A成本低

B透明性，传输业务种类多；(Transparent and various types of transmission service)

C简单，集成度高；(Simple and highly integrated)

D具有保护；(With the protection function)

E没有保护；(Without the protection function)

F最高速率可达10G (The highest rate can reach 10G)