Basic Computer Networks MCQ Question and Answer

Basic Computer Networks MCQ Question and Answer
201. The maximum data rate of a channel of 3000-Hz bandwidth and SNR of 30 dB is
  • 15, 000 bps
  • 60, 000 bps
  • 30, 000 bps
  • 3, 000 bps
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202. If the bit string 0111101111101111110 is subjected to bit stuffing for the flag string 01111110. the output string is
  • 0111101111100111111010
  • 01111011111011111100
  • 01111011111011111010
  • 0111101111101111110
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203. The ________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.
  • Residual Error rate
  • Transfer failure probablity
  • Connection release failure probability
  • Connection establishment failure probability
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204. In session layer, during data transfer, the data stream responsible for the control purpose (i.c. control of the session layer itself) is
  • regular data
  • typed data
  • capability data
  • expedited data
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205. The minimum number of bits required to represent B is
  • 1
  • 2
  • 3
  • 4
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206. The minimum number of bits required to represent all the symbols together is
  • 14
  • 11
  • 12
  • 15
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207. The average code length of the given problem is
  • 2
  • 2.25
  • 2.45
  • 3
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208. In cryptography, the following uses transposition ciphers and the keyword in LAYER. Encrypt the following message. (Spaces are omitted during encryption) WELCOME TO NETWORK SECURITY !
  • WMEKREETSILTWETCOOCYONRU !
  • EETSICOOCYWMEKRONRUILTWET
  • LTWETONRU ! WMEKRCOOCYEETSI
  • ONRU ! COOCYLTWETEETSIWMEKR
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209. Encrypt NEKEWNINRROGTTI using the above keyword in Transposition cipher method.
  • INTERWORKINGNET
  • INTERNETWORKING
  • WORKINGINTERNET
  • None of the above
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210. Assuming that for a given network layer implementation, connection establishment overhead is 100 bytes and disconnection overhead is 28 bytes. What would be the minimum size of a packet the transport layer needs to keep up, if it wishes to implement a datagram service above the network layer and needs to keep its overhead to a maximum of 12.5%.(Ignore transport layer overhead.)
  • 512 bytes
  • 768 bytes
  • 1152 bytes
  • 1024 bytes
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