Question 81 : Robustness gives the inability of a signal to withstand the impairments.
1. True
2. False
3.
4.
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Question 82 : The standard building block uses _______ of a key to transform 64-bit input into 64-bit output.
1. 32 bit
2. 48 bit
3. 64 bit
4. 128 bit
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Question 83 : In Caesar cipher, each plain text is replaced by
1. Alphabet shift
2. Numerals
3. Symbols
4. None of the mentioned
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Question 84 : Equivocation is the
1. Joint probability of X and Y
2. Conditional probability of X given Y
3. Conditional probability of Y given X
4. None of the mentioned
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Question 85 : When the key size is finite, equivocation approaches
1. Unity
2. Zero
3. Infinity
4. None of the mentioned
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Question 86 : Slow frequency hopping is
1. Several hops per modulation
2. Several modulations per hop
3. Several symbols per modulation
4. None of the mentioned
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Question 87 : Chips are the
1. Repeated symbols
2. Non repeated symbols
3. Smallest length symbols
4. None of the mentioned
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Question 88 : The sequences produced by shift register depends on
1. Number of stages
2. Feedback tap connections
3. Initial conditions
4. All of the mentioned
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Question 89 : The types of channels that reverse channel contains are
1. Traffic
2. Access
3. Traffic & Access
4. None of the mentioned
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Question 90 : How many channels are transmitted in the forward and reverse direction?
1. 1,64
2. 64,1
3. 2,32
4. 32,2
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