WorksheetsData Transmission
Total questions: 11
Worksheet time: 2mins
How many bus lines are used in serial transmission?
1
2
3
4
What can happen as we increase the speed of parallel transmisson?
Crosstalk
Inteference
Skewing
Packet loss
Why is parallel data transmission generally only used over short distances?
It is too expensive over longer distance
It is too complicated over longer distance
There is a higher chance of error over longer distance
There is a lower chance of delivery over longer distance
A standard baby monitor would be an example of what?
Simplex Data Transmission
Half Duplex
Full Duplex / Duplex
A 2 way police radio would be an example of what?
Simplex Data Transmission
Half Duplex Data Transmission
Duplex Data Transmission
Which of the following is an example of full duplex data transmission?
USB 1.0
USB 2.0
USB 3.0
USB 4.0
Which error checking method involves counting the number of 1s to find whether it is even or odd?
Check digit
Checksum
Echo Check
Parity Check
Would the byte 10001111 pass an even parity check?
Yes
No
Which is a disadvantage of parity checking?
We cannot locate where the error is
It takes a long time to calculate
It can only be done once
It is expensive to design
An echo check involves...
...counting the number of odd digits in a sequence
...requesting a copy of sent data form the receiver and comparing it with the original
...calculating the last number
...waiting for a timeout
How does an ARQ check work?
The sender resends the data if it does not receive confirmation after a certain amount of time
The sender compares the sent data to the original and sees if an error occurred
The receiver checks with the sender to find out whether the data was sent correctly
The sender checks whether the receiver has received the data by performing a calculation on a check digit
