BSc IT Sem III 2018 2019 2019 Computer Networks Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Attempt any three of the following: 15 marks
   • a. Explain the types of transmission modes for data flow
   • b. the advantages and disadvantages of different network topologies
   • c. | What is Shannon capacity of noisy channel? The signal-to-noise ratio is given as 36dB and the channel bandwidth is 2 MHz. Calculate
   • d. What are the different types of transmission impairments?
   • e. Distinguish between data rate and signal rate A signal is carrying data in which one data element is encoded as one signal element (r=1). If the bit rate is what is the average value of the baud rate if c is between 0 and 1?
   • f. Define constellation diagram. Explain its role in analog transmission
2. Q2 Attempt any three of the following: 15 marks
   • a. Describe the goals of multiplexing. Which are the 3 multiplexing techniques?
   • b. Define FHSS (Frequency Hopping Spread Spectrum). Explain how it achieves bandwidth sharing
   • c. Discuss the advantages and disadvantages of optical fiber
   • d. Explain the two technologies of circuit switching
   • e. List and explain the services provided by data link layer
   • f. | How does a single-bit error differ from a burst error?
3. Q3 Attempt any three of the following: 15 marks
   • a. Compare and contrast flow control and error control
   • b. Explain the working of stop-and-wait protocol
   • c. Discuss the concept of pure ALOHA
   • d. Write note on TDMA ( Time Division Multiple Access )
   • e. Discuss any five characteristics of standard Ethernet Write short note on routers
4. Q4 Attempt any three of the following: 15 marks
   • a. List and explain the services provided by network Layer Write short note on NAT (Network Address Resolution)
   • c. What is fragmentation? Discuss the three fields in an IP datagram related to fragmentation
   • d. How to overcome instability in distance vector routing algorithm
   • e. Discuss different timers in RIP (Routing Information Protocol)
5. Q5 Attempt any three of the following: 15 marks
   • a. Explain the concept CSMA/CA
   • b. the services provided by User Datagram Protocol (UDP)
   • c. the three-way handshaking in TCP (Transmission Control Protocol) for connection
   • d. Explain the process of transferring a mail
   • e. Explain the architecture of World Wide Web (WWW)
   • f. Briefly explain the different timers in TCP (Transmission Control Protocol)

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