Basic Computer Networks Questions and Answers
Basic Computer Networks questions with answers help learners understand key networking concepts essential for IT and engineering students. This topic covers OSI layers, TCP/IP model, IP addressing, routing, and network devices like switches and routers. These technical interview questions and answers are commonly asked in campus placements and certification exams by companies such as Cisco, TCS, and Infosys. By practicing networking MCQs and interview-based questions, students can strengthen their fundamentals and perform better in both theoretical and practical assessments related to computer networks.
Basic Computer Networks
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217 questions
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