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
191. In the carrier sense network if the prevailing condition is a 'channel busy', then which of the following are correct ?
- If the technique used is non-persistent then it results in randomised wait and sense
- If the technique used is 1-persistent then the channel is continually sensed.
- If the technique used is p-persistent then randomised retransmissionis done.
- If the method used is non-persistent then continuous sensing results.
192. Which of the following are non-polling systems ?
- TDMA
- Stop and Wait
- Xon/Xoff
- Token passing
193. Pick the systems that can be used in both priority and non-priority modes.
- TDM
- Register insertion
- Carrier sense systems
- Token passing
194. How many character per sec (7bits + 1 parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 start and 1 stop bit)?
- 300
- 240
- 250
- 275
195. Which one the following network uses dynamic or adaptive routing ?
- TYMNET
- ARPANET
- SNA (IBM's System Network Architecture)
- None of the above
196. The number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self connection is
- 100
- 45
- 50
- 90
197. A terminal multiplexer has six 1200 bps terminals and 'n' 300 bps terminals connected to it. The outgoing line is 9600 bps. What is the maximum value of n ?
- 4
- 16
- 8
- 28
198. The difference between a multiplexer and a statistical multiplexer is:
- Multiplexers use TDM (time dividion multiplexing), while statistical multiplexer uses FDM (frequency division multiplexing).
- Multiplexers often waste the output link capacity. while statistical multiplexers optimize its use.
- Statistical multiplexers need buffers while multiplexers do not need buffers.
- Multiplexers use the D.25 protocol, while statistical multiplexers use the ALOHA protocol.
199. A moern constellation diagram has data points at (0,1) and (0,2). What type of modulation does the modern use ?
- Phase modulation
- Amplitude modulation
- Both (a) and (b)
- None of the above
200. Maximum data rate of a channel for a noiseless 3-kHz binary channel is
- 300 bps
- 6000 bps
- 1500 bps
- none of the above