HNBGU BCA Third Semester Previous Year 2017-18 Question Papers
Computer Networks
NOTE: Attempt any five question. Each question carries 5 marks
- What is topology? Differentiate between any two on the basis of various parameters.
- Differentiate between OSI model and TCP/IP model.
- Explain IP4 diagram.
- A noiseless 4KHz channel is sampled every 1m/sec. What is maximum data rate?
- Data link protocols almost always put the CRC in trailer rather in header. Why?
- Sketch the Manchester encoding for the bit stream 0001110101
- If the TCP round trip time, RTT, is currently 30m/sec and the following acknowledgement come in after 26, 32 and 24m/sec, respectively. What is new RTT estimate? Use
=0.9
- (a) Write short notes on the following
(i) Twisted pair cable
(ii) Coaxial cable
(b) What do you understand by transmission impairment? Explain three major problems. - (a) Write short notes on the following:
(i) PCM
(ii) QAM
(b) Differentiate between circuit switching, packet switching and message switching. - (a) What do you understand by bit stuffing? Explain its algorithm. If the bit string 0111101111101111110 is bit stuffed, what is the output string?
(b) Explain layers of X.25 - (a) Consider the following sequences of frame transmission from sender to receiver:
(i) Frame 0, frame 1 is sent; both acknowledged
(ii) Frame 2, frame 3, frame 4 sent, frame 2 acknowledged NAK 3 sent to sender.
(iii) Frame 5, frame6, frame 7 are sent.
Designed this transmission using Go Back nARQ.
Will Frame 5,6 and 7 be accepted by receiver
(b) write short notes on the following:
(i) FDDI
(ii)Fast Ethernet - (a) Define Routing. Which later is responsible for this task? Explain the Hierarchical Routing
(b) What do you understand by congestion? Explain various congestion control policies. - (a) Explain TCP connection management.
(b) Write short notes on the following.
(i) FTP
(II) SMTP
System analysis and design
NOTE: Attempt any five question. Each question carries 5 marks
- What is the role of documentation in a system?
- Explain any two methods of face gathering.
- What do you mean by system? Explain open systems and closed systems.
- What are the basis principle of a successful system?
- Describe the different steps in system design
- Define the importance of system requirement analysis.
- Explain the objectives in designing an Information System.
- Explain the different phases of a System Development Life Cycle With a neat diagram.
- Clarify the objectives of MIS. Discuss its significance its management.
- Prepare a Data Flow Diagram for a college Information System. Explain in detail about it.
- Discuss the process of input output and form design of a system.
- What are system requirements? How would an analysis determine the user’s need for a system? Explain
- Write short notes on any four of the following:
- DSS
- System planning
- Technical feasibility
- Structured English
- Decision trees
HTML programming
NOTE: Attempt any five question. Each question carries 5 marks
- What is World Wide Web?
- What is a browser? Explain the use of JVM in a browser.
- Explain the ordered and unordered lists in HTML
- Explain the use of HTTP protocol to process web pages.
- What are cookies? Explain their usage.
- What is Uniform Resource locator (URL)?
- Explain the client –server model of networking.
- Write a brief note on any five HTML tags.
- Explain HTML tables illustrating the rowspan and colspan elements.
- What are HTML frames? Write a code to make a commonly required frame layout
- Explain the HTML forms implementation with example to get the student details
- What is Cascade Style Sheet? Define a sample CSS code for a group of web pages.
- What are the different ways to apply CSS to HTML? Give some example.
- Explain the tags used for marque image insertion in a web page.
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