Detection
Each layer has its own error detection: the end-to-end principle
Checksum
CRC (Cyclic Redundancy Code)
- Ethernet append a CRC
- Good for detection, catch any 2 bits error, odd number of bit error or any burst
cbits long.
MAC (Message Authentication Code)
- TLS append MAC
- Robust to malicious modifications, but not errors
Handling
- Wireless network error handling?
Retransmission Strategy
Based on the size of the receiving buffer size.
Go Back N
If one failed, retransmit the entire window.
Selective Repeat
Retransmit only the packet that is lost.