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Computer Networks MCQs
Computer Networks MCQs
1018 MCQs (Page 40 of 102)
Attempt Computer Networks Quiz
Which of the following persistent method of random-access protocol reduces the collisions and efficiency of the network?
A. 1 ? persistent
B. Non persistent
C. Persistent
D. 1 ? persistent and non-persistent
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What is the vulnerable time in carrier sense multiple access?
A. T propagation
B. T frame
C. 2*t frame
D. 2*t propagation
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Slotted aloha has vulnerable time that is half of the vulnerable time of pure aloha.
A. True
B. False
C.
D.
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Which of the following is not a channelization protocol?
A. Frequency division multiple access
B. Time division multiple access
C. Code division multiple access
D. Bandwidth division multiple access
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What technique is used by the TDMA to accomplish synchronization?
A. Preamble bits
B. Synchronization bytes
C. Guard bits
D. Start points
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Which of the following is not an alternative name for symmetric key cryptography?
A. Secret key cryptography
B. Public key cryptography
C. Conventional encryption
D. Private key cryptography
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What is the cipher text for the text “GREET HER”, if Caesar Cipher is used(key=3)?
A. Kviiy liv
B. Kviix liv
C. Lwjjy mjw
D. Juhhw khu
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What is the cipher text for the message “TAKE ME TO THE PARTY”, id Rail Fence technique is used with two rows?
A. Tkmtteataeeohpry
B. Takemetotheparty
C. Taekmeotthpearyt
D. Yrphoeeataettmkt
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What are the two broad categories of symmetric key cryptography?
A. Transposition and substitution
B. Classical and modern
C. Stream and block
D. Classical and block
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Which of the following algorithm does not belong to symmetric key ciphers?
A. Des
B. Rc4
C. Aes
D. Diffie-hellman
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