BSc IT Sem III 2019 2020 Oct 2020 COMPUTER NETWORK Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Explain various types of network
2. Q2 Attempt any three. 15 marks
3. Q4 State and explain advantages and disadvantages of optical fibre
   • b. What is checksum? Explain with example Explain space division switch
   • d. A host with IP address 130.23.3.20 and physical address OxB23455102210 has a packet to send to another host with IP address 130.23.43.25 and physical address The two hosts are on the same Ethernet network. Show the ARP request and reply packets encapsulated in Ethernet frames e Explain Frequency Division Multiplening channels. each with a bandwidth, are to be multiplexed together. What is the minimum bandwidth of the link if there is a need for a guard band of 10 between the channels to prevent interference? various in packet switched netw orks O3. Attempt any three. (15)
   • a. Explain encoding schemes for Fast Ethernet
   • b. Fxplain operation of cellular telephony Explain the services of 802.11
   • d. Write short note on CSMA/CD. ‘ propagation time (including the delays in the devices and ignoring the time needed to send a jamming signal, as we see later) is 25.6 ts. what is the minimum size of the Explain PPP frame format layers in Bluetooth Attempt any three. (15)
   • a. Given an IP address and Network Mask 255.255.255.192. the
   • (i) Network address
   • (11) Broadcast address
   • b. Explain the transition state in DHCP. \ Explain various in RIP
   • d. Explain [Pv6 header format Explain various options in is the responsibility of Solve the following:
   • (i) A packet has arrived with an M bit value of 1. Is this the first fragment. the last fragment, or a middle fragment? Do we know if the packet was (il) In an IPv4 packet, the value of HLEN is 5, and the value of the total length field is How many bytes of data are being carried by this packet?
4. Q5 Attempt any three. 15 marks
   • a. Explain Go Back N Protocol
   • b. Explain three way handshake in architecture of WWW
   • d. Explain various SMTP commands in process of email delivery
   • e. Explain various types of resolution in DNS The content of UDP header in hexadecimal format is CB84000D001 Answer
   • (i)What is the source port number?
   • (ii)What is the destination port number’? is the total length of user datagram? is the length of data? the packet directed from client to server or vice versa?

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