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
202. If the bit string 0111101111101111110 is subjected to bit stuffing for the flag string 01111110. the output string is
- 0111101111100111111010
- 01111011111011111100
- 01111011111011111010
- 0111101111101111110
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
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
206. The minimum number of bits required to represent all the symbols together is
- 14
- 11
- 12
- 15
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
209. Encrypt NEKEWNINRROGTTI using the above keyword in Transposition cipher method.
- INTERWORKINGNET
- INTERNETWORKING
- WORKINGINTERNET
- None of the above
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