Ingeniería informatica Redes Tema 10
1 Which of the following best describes a single-bit error?
2 Which error detection method uses one's complement arithmetic?
3 Which error detection method consists of just one redundant bit per data unit?
4 Which error detection method involves polynomials?
5 If the ASCII character G is sent and the character D is received, what type of error is this?
6 If the ASCII character H is sent and the character L is received, what type of error is this?
7 In cyclic redundancy checking, what forms the check bits?
8 In CRC, if the dataword is 111111, the divisor 1010, and the remainder 110, what is the codeword at the receiver?
9 In CRC, if the dataword is 111111 and the divisor 1010, what is the dividend at the sender?
10 At the CRC generator, _______ is (are) added to the dataword after the division process to create the codeword.
11 The sum of the checksum and data at the receiver is _______ if no error is detected.
12 In CRC, the quotient at the sender _______.
13 At the CRC checker, _______ means that the dataword is damaged.
14 A codeword of 10 bits has only four 0s, how many terms are in the polynomial representation of this code?
15 In CRC, if the remainder is only three bits, the divisor should be __________ bits.
16 How many bits are in the divisor if we use CRC-8?
17 Checksum uses ____________ addition.
18 To detect five errors, the Hamming distance between each pair of codewords should be at least_________.
19 To correct five errors, the Hamming distance between each pair of codewords should be at least_________.
20 A checksum can _________ errors.
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