June, 2014 BCS-061 : TCP / IP PROGRAMMING Maximum Marks : 60
Time : 2 hours
Note : Question no. 1 is compulsory. Answer any three from the rest. 1.
(a) What is the significance of the "Time to Live" value in an IP header ? (b) Consider a subnet mask 255.255.240.0 is assigned to an address of class B. How many hosts are possible per subnet and how many subnets are possible ? (c) Compare connection-oriented and connection-less services using example(s) of each. (d) What is SNMP ? Explain its importance in TCP/IP protocol stack. (e) Close ( ) and shut down ( ) functions are used to close a socket. With the help of examples, show how these function calls differ. (f) Explain the concept of recursive and iterative resolution in DNS. (g) What is byte ordering ? Explain the functions used by byte order conversion.
BCS-061
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P.T.O.
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(a) What is the maximum capacity of datagram that can be carried by Internet Protocol (IP) ? Also, explain how IP datagram are deleted from the network. (b) What is the full-form of HTTP ? Explain the data transfer methods used by HTTP.
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(a) Explain the count-to-infinity problem related to distance vector routing with the help of a suitable example. (b) What is meant by a socket ? Write the differences between active and passive sockets.
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Write an algorithm each for UDP client and UDP server with the following specifications : • UDCP Client will start the communication, and send a string of characters to the server. • UDP server will accept the string (upto 10 characters only) and as a reply it will send the reverse of the string to the respective client. Note : Make assumptions, if any.
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Explain the significance of following header fields of TCP and IP. (a) Type of Service (b) Sequence Number (c) HLEN (d) Header Checksum
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