W14
Understanding CRC and Error Detection
Test your knowledge on CRC (Cyclic Redundancy Check) and error detection techniques in networking. This quiz includes multiple-choice questions designed to assess your understanding of critical concepts in data transmission and integrity.
- Calculate CRC bits for a given data stream.
- Identify error detection strategies used in the link layer.
- Understand the necessity of TCP in ensuring data order and reliability.
CRC Given a 5 bit generator G = x4 + x + 1 (10011) what 4 CRC bits would you append to the data bitstream D = 1101011011 ?
1110
1101
Name 3 error detection strategies employed by the link layer.
Parity checks
Check-summing
CRC code
If all the links in the internet provided reliable delivery would a protocol like TPC be needed? Why or why not
12. Amend the above program so that it displays the temperature as an approximation as a whole number but also gives you the exact temperature as a decimal value, for example the new message would be:
Although each link guarantees that an IP datagram sent over the link will be received at the other end of the link without errors, it is not guaranteed that IP datagrams will arrive at the ultimate destination in the proper order. With IP, datagrams in the same TCP connection can take different routes in the network, and therefore arrive out of order. TCP is still needed to provide the receiving end of the application the byte stream in the correct order. Also, IP can lose packets due to routing loops or equipment failures.
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