Computer Science Homework

1. Data transmission is the physical transmission of data over a point-to-point or a point-to-multipoint communication channel.

2. In serial communication, data is sent one bit at a time, sequentially, over a communication channel. Parallel transmits several streams of data simultaneously along multiple channels. 

3. You would use Serial when you wanted a file that took up a lot of space and you'd use Parallel when you wanted you send it quickly.

4.We need to check for errors because if we don't the data may get corrupted and also because it may not send as it may not have read it correctly.

5. A parity bit , is added to the end of a string of binary code that indicates whether the number of bits in the string with the value one is even or odd.