From the text, we learn that speed connection
A
ranges from 40 to 100 gigabits for all ordinary computers.
B
may reach 1,000 gigabits when used for specific purposes.
C
of one gigabit per second is being replaced by 10-gigabit connections.
D
varies between 40 to 100 gigabits depending on the engineer in charge.
E
will soon reach 100 gigabits per second.