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Data Transmission Network - Multiple Choice Questions and Answers | Page-5

21 Which of the following is not a bounded media of transmission of RF energy.
C Laser beam
D Fiber optic cable

Answer: Option [C]
22 The information to be communicated in a communication is the ________
A message
B medium
C protocol
D none of these

Answer: Option [A]


23 Networks are judged by
A Security
B Reliability
C Performance
D All of the above

Answer: Option [D]
24 In ARQ and NAK
A is sent by the recipient if the message contains an error
B is sent by the recipient if the message was received without error
C means that the sender should continue with sending the next message
D is sent by the sender at the same time as it sends a data packet

Answer: Option [B]
25 A brute force attack against an encryption system:
A is known as RC4
B is also known as 3DES
C always uses the Rijndael algorithm
D tries to gain access by trying every possible key

Answer: Option [D]

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