11. What is an error in data transmission?
a) When the sender's information matches the receiver's information
b) When the receiver's information does not match the sender's information
c) When the sender transmits data without encryption
d) When the data is received without any noise

12. What can introduce errors in the binary bits during transmission?
a) Encryption
b) Compression
c) Noise
d) Modulation

13. What is a single-bit error?
a) An error affecting all bits in a data transmission
b) An error affecting one bit in a data transmission
c) An error affecting the header of the data
d) An error affecting the parity bit

14. What is a multiple-bit error?
a) An error affecting one bit in a data transmission
b) An error affecting all bits in a data transmission

c) An error affecting more than one bit in a data transmission
d) An error affecting only the first bit in a data transmission