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Previous Year Exam Questions for Advanced Computer Network - ACN of 2019 - SPPU by Snehal Kadav

  • Advanced Computer Network - ACN
  • 2019
  • PYQ
  • Savitribaai Phule University Pune - SPPU
  • Computer Science Engineering
  • B.Tech
  • 13 Views
  • Uploaded 3 months ago
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Total No. of Questions : 10] SEAT No. : P3954 14 .13 CE 9.1 G P 11 .20 01 1 0 15 8/1 2 2/2 1 01 70 9:1 9:1 2 [Total No. of Pages : 4 [5253] - 541 T.E. (Computer Engg.) COMPUTER NETWORKS (2015 Pattern) [Max. Marks : 70 Instructions to the candidates : 1) Neat diagrams must be drawn wherever necessary. 2) Figures to the right side indicate full marks. 3) Calculator is allowed. 4) Assume Suitable data if necessary. 9:1 70 21 01 [2] 2/2 Draw flowchart of CSMA/CA. OR 8/1 15 c) Differentiate between OSI and TCP/IP reference model. [4] Represent 101011100 using Manchester and differential Manchester line coding technique. [4] 01 Q1) a) b) 9:1 2 Time : 2½ Hours] Q3) a) b) Explain control field of HDLC w.r.t I-frame, S-frame and U-frame. [6] A slotted ALOHA network transmits 200-bit frames using a shared channel with a 200-kbps bandwidth. Find the throughput if the system (All stations together) produces [4] .20 11 2 9.1 CE 9:1 .13 70 2/2 01 15 1000 frames per second 500 frames per second 01 21 9:1 14 i) ii) 8/1 10 .20 11 .13 9.1 CE GP OR Explain selective repeat ARQ in detail. [5] A bit stream 1001101 is transmitted using an hamming code. Show the actual bit string transmitted. Suppose 7th bit from left is inverted during transmission, show that this error is detected and corrected at the receiver’s end. [5] 14 Q4) a) b) [6] [4] 10 Explain in brief: FHSS and DSSS. Explain fiber optic modes of propagation. GP Q2) a) b) P.T.O.

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An organization is granted the block 130.34.12.64/26. The organization needs to have four subnets with equal number of addresses in each subnet. What are the subnet addresses and the range of addresses for each subnet? [6] b) What are general techniques to improve quality of service ? Explain any one in detail. [6] c) Draw and Explain IPV6 header. Explain the significance of extension header. [6] 14 .13 CE 9.1 G P 11 .20 01 1 0 15 8/1 2 2/2 1 01 70 9:1 9:1 2 Q5) a) OR 9:1 2 9:1 70 01 21 2/2 8/1 ICMP 15 ii) [8] 10 NAT 01 i) .20 Explain Distance Vector Routing Algorithm? Consider topology given in fig.(a) and Vectors received from router J’s four neighbors are given in fig (b). Calculate New routing table for router J using Distance Vector Routing Algorithm. [6] 14 .13 [5253] - 541 2 70 01 2/2 8/1 10 .20 11 9.1 CE GP 01 15 21 9:1 14 9:1 .13 2 9.1 CE c) Write a short note on 11 b) A host with IP address 130.23.3.20 and physical address B23455102210 has a packet to send to another host with IP address 130.23.43.25 and physical address A46EF45983AB. The two hosts are on the same Ethernet network. Show the ARP request and reply packets encapsulated in Ethernet frames. [4] GP Q6) a)

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What causes Silly Window syndrome? How it is avoided? Explain. [4] b) In a Stop-and-Wait system, the bandwidth of the line is 2 Mbps, and 1 bit takes 20 milliseconds to make a round trip. What is the bandwidth-delay product? If the system data packets are 2,000 bits in length, what is the utilization percentage of the link? [4] c) For each of the following applications, determine whether TCP or UDP is used as the transport layer protocol and explain the reason(s) for your choice [8] 14 .13 CE 9.1 G P 11 .20 01 1 0 15 8/1 2 2/2 1 01 70 9:1 9:1 2 Q7) a) i) Watching a real time streamed video ii) Web browsing iii) A Voice over IP (VoIP) telephone conversation iv) YouTube video 9:1 2 OR What are the types of socket? Explain various socket primitives used in connection oriented client server approach. [8] b) Explain UDP Header? Below is an Hexadecimal dump of an UDP datagram captured. [8] 70 01 2/2 15 21 9:1 Q8) a) 8/1 10 GP 01 e2 a7 00 0D 00 20 74 9e 0e ff 00 00 00 01 00 00 00 00 00 00 06 69 73 61 74 61 70 00 00 01 00 01 ii) What is destination port number? iii) What is total length of the user datagram? iv) What is the length of the data? v) Is packet directed from a client to server or vice versa? Explain DNS message format? [5253] - 541 3 .20 MIME 9:1 9:1 70 01 2/2 8/1 [6] 11 ii) 9.1 DHCP 10 01 GP i) 14 c) Write short notes on CE b) What is the difference between persistent & non persistent HTTP? Explain HTTP request and reply message format. [6] .13 Q9) a) 15 21 14 .13 2 9.1 11 .20 What is source port number? CE i) [4]

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OR Explain FTP? Can we specify file transfer in a Web page? Explain with the help of suitable example. [8] b) Browsers have a in-built caching mechanism for a better user experience. How do websites indicate if a web resource needs to be cached or not? Show HTTP messages in transit for both scenarios. [8] 14 .13 CE 9.1 G P 11 .20 01 1 0 15 8/1 2 2/2 1 01 70 9:1 9:1 2 Q10)a) 70 01 2/2 8/1 10 .20 11 14 .13 [5253] - 541 4 70 01 2/2 8/1 10 .20 11 9.1 CE GP 01 15 21 9:1 14 9:1 .13 2 9.1 CE GP 01 15 21 9:1 9:1 2 ssss

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