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Bharati Vidyapeeth University, Pune Faculty of Management Studies Master of Computer Applications (MCA) – SEM- III Subject Code J030219 Title Computer Networks Weight age for Examinations Int: 30 Univ: 70 1. University theory paper is of 70 marks and of 3 hours duration. 2. There will be Two sections- Section I and Section II. 3. In Section I there will be SIX questions, each of 10 marks, of which FOUR are to be answered. 4. In Section II there will be Three questions, each of 15 marks, ofwhich TWO are to be answered. The Questions in Section II are of applied nature such as problem solving ( exercise regarding IP addressing , routing problems etc.) The paper must cover entire syllabus. Question Bank Q.1 Differentiate between the following I. Circuit Switching, Message Switching and Packet Switching II. FDM, TDM and WDM III. Synchronous and Asynchronous Transmission IV. Analog and Digital Signals V. Connection-oriented and Connectionless Services VI. Guided and Unguided Media VII. Virtual and Datagram Circuit VIII. CSMA/CD and CSMA/CA IX. Connection based media access protocol and polling based media access protocol X. Connection oriented / Connectionless services XI. Virtual circuit / Datagram circuit XII. MANET / Wireless sensor network XIII. Static / Dynamic routing
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Bharati Vidyapeeth University, PuneFaculty of Management Studies
Master of Computer Applications (MCA) – SEM- III
Subject Code J030219
Title Computer Networks
Weight age for Examinations
Int: 30 Univ: 70
1. University theory paper is of 70 marks and of 3 hours duration.2. There will be Two sections- Section I and Section II.3. In Section I there will be SIX questions, each of 10 marks, of which FOUR are to be answered.4. In Section II there will be Three questions, each of 15 marks, ofwhich TWO are to be answered. The Questions in Section II are of applied nature such as problem solving ( exercise regarding IP addressing , routing problems etc.)The paper must cover entire syllabus.
Question Bank
Q.1 Differentiate between the followingI. Circuit Switching, Message Switching and Packet Switching
II. FDM, TDM and WDMIII. Synchronous and Asynchronous TransmissionIV. Analog and Digital SignalsV. Connection-oriented and Connectionless Services
VI. Guided and Unguided MediaVII. Virtual and Datagram Circuit
VIII. CSMA/CD and CSMA/CAIX. Connection based media access protocol and polling based media access protocol
X. Connection oriented / Connectionless servicesXI. Virtual circuit / Datagram circuit
XII. MANET / Wireless sensor networkXIII. Static / Dynamic routing
Q.2 Explain TCP/IP Reference model with neat diagram.
Q.3 Explain OSI/ISO Reference model with neat diagram.
Q.4 Perform a comparative study between TCP/IP and OSI.
Q.5 Explain layered architecture of computer networks.(a) What does horizontal communication specify in context of OSI model?(b) What does vertical communication specify in context of OSI model?
Q.6 Explain types of Transmission media and their characteristics.
Q.7 (a)Explain three generations of Mobile Telephone System. (b)Compare generations on the basis of services, standards used, data bandwidth and multiplexing used.
Q.8 What are services provided by data link layer?
Q.9 Explain various ARQ retransmission strategies.
Q.10 Discuss problems of channel allocation? What are different media access control protocols? Give advantage and disadvantage of each protocol.
Q.11 Explain following:(a)Ethernet as examples of physical and MAC later(b) Token Bus(c) Token Ring
Q.12 What is the importance of congestion control algorithms? Explain load shedding and jitter control.
Q.13 What are the limitations of distance vector routing? How they are addressed in link state routing?
Q.14 Explain following routing algorithms.a. Flooding routingb. Hierarchical routingc. Broadcast routingd. Multicast routing
Q.15 Explain various IP Addressing methods.
Q.16 Differentiate Interior Gateway / Exterior Gateway protocol.
Q.17 . Explain services of Transport layer.
Q.18 Explain Internet Transport Protocols.-TCP / UDP
Q.19 Write short note on:-a. Ethernetb. X.25c. ISDNd. Frame Relaye. Token Ringf. Mobile IPg. IPV6
h. DNSi. FTPj. TELNETk. SMTPl. SNTP
Q.20 What are the types of Wireless networks? Explain with example.
Q.21 What is IEEE 8.11X standards? Explain any two of 8.11X standards.
Q.22 Explain Physical and MAC layer description of 802.16 and 802.20.
Q.23 Explain the salient design issues that must be examined in MANET.
Q.24 Explain the properties of DSDV Protocol.
Q.25 Define MANET. Explain any one of Dynamic routing protocol for MANET.
Q.26 Define Wireless Sensor Network. Discuss Network Architecture of WSN.
Q.27 Compare following Wireless networks:- BLUETOOTH, INFRARED, MANET, SENSOR NETWORKS
Q.28 Numerical Problems and applied nature questions.
Q.29 Consider the subnet of figure . Distance vector routing is used and the following vectors have just come in to router C:
- From B ( 5,0,8,12,6,2)- From D (16,12,6,0,9,10)- From E (7,6,3,9,0,4)
The measured delays to B, D, E are 6, 3 and 5 respectively, What is C’s new routing table. Give both the outgoing line to use and the expected delay.
Q.30 For hierarchical routing with 4800 routers, what region and cluster sizes should be chosen to minimize, the size of routing table, for a three layer hierarchy.
Q.31 Convert the IP address whose hexadecimal representation is C22F1582 to dotted decimal notation.
Q.32 A class B network on the Internet has a subnet mask of 255.255.240.0. What is the maximum number of hosts per subnet?
Q.33 Find the class of each IP address given below; give the suitable explanation for your answer.
a. 227.12.14.87b. 193.14.56.22c. 14.23.720.8d. 252.5.15.111e. 134.11.78.56f. 000 000 00 11110000 11111111 00110011g. 100 000 00 11110000 11111111 0110011
Q.34 A Computer on a bridged network sends out a packet to a device that is not present on the network. What do the bridges do with the packet?
Q.35 A simple crossbar switch has five input lines and five output lines. How many cross points are present in the switch.
Q.36 . The IP network 192.168.130.0 is using the subnet mask 255.255.255.224. What subnet are the following hosts on?
192.168.130.10192.168.130.67192.168.130.93192.168.130.199192.168.130.222192.168.130.250
Q.37 To provide more subnets, a class B address is assigned the subnet mask of 255.255.240.0. How many hosts are possible per subnet?
Q.38 Assuming that all routers and hosts are working properly and that all software in both is free of all errors, is there any chance, however small, that a packet will be delivered to the wrong destination?
Q.39 A router has the following (CIDR) entries in its routing table:Address/mask Next hop
135.46.56.0/22 Interface 0
135.46.60.0/22 Interface 1
192.53.40.0/23 Router 1
default Router 2
For each of the following IP addresses, what does the router do if a packet with that address arrives?(a) 135.46.63.10(b) 135.46.57.14(c) 135.46.52.2(d) 192.53.40.7(e) 192.53.56.7
Q.40 Compute a multicast spanning tree for router C in the following subnet for a group with members at routers A, B, C, D, E, F, I, and K.
Q.41 a) Your institution has a Class B IP address 150.193.0.0. For your physical network, you need atleast 50 subnets interconnected with routers. Each of the subnet needs to be able to handle at least750 hosts (workstations, rervers, and router interfaces). For the first 10 of these subnets give: i) thenetwork address, ii) subnet mask, iii) subnet address, iv) range of possible host IP addresses, v)Broadcast address [CISCO].
Q.42 b)As the network manager for your local campus, you were given the first 3 of these subnets, A, Band C, as illustrated in the figure below. In the figure, fill in the blanks with correct Network and IPaddresses.
A
B
D
L
I
JK
E
F
C
Original Subnet
GH
