Computer Network
With a single bit parityscheme, withevenparity, which bit string would be correct?
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With a single bit parityscheme, with evenparity, which bit string would be correct?
 1110101011
 0110101011
 0110001011
 0110101010
2 . What is the advantage of twodimensional bit parity?
 It can detect an error in a twodimensional array.
 It can detect and correct three bit errors.
 It can detect and correct two bit errors.
 It can detect and correct a single bit error.
 In any error checking scheme (pairity, CRC, checksum) which statement defines the correct description of a match and nonmatch?
 Check matches: The data is likely correct, but there is a chance it is not based on the size of the checksum. Check does not match: The data is likely bad, but there is a chance it is correct based on the size of the checksum.
 Check matches: The data must be correct. Check does not match: The data must not be correct.
 Check matches: The data is likely correct, but there is a chance it is not based on the size of the checksum. Check does not match: The data must not be correct.
 Check matches: The data must be correct. Check does not match: The data is likely bad, but there is a chance it is correct based on the size of the checksum.
 what is the relationship between G, D and R in the CRC?
 D can be any size, but G and R must match in length.
 D must be an even multiple of G, and R must be smaller than G.
 D can be any size, but G must be one larger than R.
 D can be any size, but R must be longer than G.
 Find the CRC remainder (R) for the following binary data (D) and generator (G) D = 10101010 G = 1001
 011
 101
 100
 000
 What is the primary operation in CRC?
 XOR
 Multiply
 Subtract
 Add
7. Which partitioning methods can not use all available bandwidth if some nodes do not use it?
 TDMA
 FDMA
 Slotted ALOAH
 CSMA
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