Code: AT15                                                         Subject: INTERNET & WEB TECHNOLOGY

Time: 3 Hours                                                                                                     Max. Marks: 100

NOTE: There are 9 Questions in all.

· Question 1 is compulsory and carries 20 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.

· Out of the remaining EIGHT Questions answer any FIVE Questions. Each question carries 16 marks.

· Any required data not explicitly given, may be suitably assumed and stated.

Q.1       Choose the correct or best alternative in the following:                                         (2x10)

a. Each entry in a routing table represents: 

(A) Individual host                                 

(B) Individual network

(C)  Individual host in a particular network

(D)  None of the above

b. Like IPv4, IPv6 provides:

(A) Connectionless services

(B) Connection oriented services

(C) Both (A) and (B)

(D) None of the above

             c.    The following program uses ICMP echo request and reply messages to determine whether a destination is reachable.

(A) Traceout                                            (B) Ping

(C) Telnet                                                (D) None of the above.

             d.    LocalTalk is an example of

(A) Star                                                   (B) Bus

(C) Ring                                                  (D) None of the above

             e.    SMTP protocol is used for

(A)   uploading mail to mail server           

(B)   downloading mail from mail server

(C)   network management                      

(D)   None of the above

             f.     In IP addressing scheme, class used for multicasting is:

(A) Class A                                             (B) Class B

(C) Class C                                             (D) Class D

g. Hardware that calculates CRC uses

(A) Shift register                                      (B) XOR unit

(C) Both (A) and (B)                               (D) None of the above

h. The basic differences between UDP and TCP is

(A) TCP is reliable and UDP is not reliable                                                                       

(B) TCP is connection oriented and UDP is connection less

(C) Both (A) & (B)                                 

(D) None of the above

i. SMDS stands for

(A) Switched Multi-megabit Data Service

(B) Switched Multi-megabyte Data Service

(C) Simple Multi-megabit Data Service

(D) None of the above

             j      The type field in an Ethernet frame carrying an ARP message must contain the following value:  

(A) 0x806                                               (B) 0x805

(C) 0x801                                               (D) None of the above

Answer any FIVE Questions out of EIGHT Questions.

Each question carries 16 marks.

Q.2     a.   The amount of data carried in IP datagram is not fixed. Is it true or false? Explain.              (8)

             b.    What is the chief advantage of reassembling datagram fragments at the ultimate destination, not in between?                                                                                                                        (8)

Q.3     a.   What do you mean by Network topology? Discuss about Ring topology and Token passing.                                                                     (8)

             b.   What are the email gateways.                                                                             (8)

Q.4           Write short notes on the following:       

(i) Adaptive retransmission

(ii) Static versus dynamic routing

(iii) Public key encryption

(iv) Internet Firewall                                                                                 (44)

Q.5     a.   What are the ordered and unordered lists in HTML? How to make list of each type?                      (8)

     b.   What are the constituents of XML. Discuss about them.                                      (8)

  Q.6     a. What are the differences between TCP and UDP? Discuss the IP datagram header format.             (8)

             b.   What do you mean by RPC? Discuss about the implementation of RPC in various technologies.                                                                 (8)

Q.7     a.   What are the advantages and disadvantages of using Bus topology?                    (8)

b.   If an Email message is sent to a mailing list, is every recipient of the list  guaranteed to receive a copy? Explain                                                (8)

Q.8     a.   How many layers in ISO-Network layer reference model? Discuss about them.                  (8)

             b.   What are the advantages of caching in a web browser?                                       (4)

c.   What is the difference between cookies and session variables?                            (4)

Q.9     a.   What are the mobile devices? Is there any disadvantage of using them?               (4)

             b.   What is GPRS? What are the differences between GSM and GPRS.                  (4)

     c.   Discuss the significance of WAP gateways.                                                         (4)

d.   Discuss about the VPN (Virtual Private Network).                                             (4)