Section E - 7 - Error Detection & Correction - Error Correct

What two types of ARQ will continue to send frames while it waits for acknowledgements?

• Go-Bank-N ARQ

• Stop-and-Wait ARQ

• Selective Repeat ARQ

What does ARQ stand for?

(a)  

What does FEC stand for?

(a)  

What type of error correction sends redundant error correction code along with a frame?

• ARQ

• CRC

• FEC

• Parity Bits

What size error can Hamming code correct?

• Single-bit errors

• 2-bit errors

• 4-bit errors

• 8-bit errors

What form of error correction does TCP use?

• Parity Bits

• FEC

• CRC

• ARQ

FEC is commonly used in wireless transmissions.

• True

• False

Which of the following is a benefit of FEC over ARQ?

• It reduces the amount of redundant data being sent along with a frame.

• It reduces the likelihood that data will need to be retransmitted.

• It can correct all forms of errors without retransmission.

• There are no benefits of FEC over ARQ.

What is a disadvantage of ARQ over FEC?

• You may retransmit data a lot, which causes delays.

• It cannot fix all errors.

• You have to send a lot of redundant data which reduces data transfer speed.

• It isn't practical for most types of network.