Bachelors Level/Second Year/Fourth Semester/Science bit/fourth semester/network and data communications/syllabus wise questions
Bachelors In Information Technology
Institute of Science and Technology, TU
Network and Data Communications (BIT254)
Year Asked: 2079, syllabus wise question
Application layer
1.
Describe Quality of Service. What are its practical significances? [5]
2.
What is FTP and how does it work? [5]
Data link layer
1.
Explain the design of Stop-and-Wait ARQ. Illustrate with suitable flow diagram example [10]
2.
What is MAC-address? The message sequence is 1101011011 and generator polynomial G(X) = $x^3 + x + 1$. Calculate the transmitted encoded frame [5]
Fundamental of Data Communication
1.
Differentiate between switch, router, and hub. [5]
Network layer
1.
What are the features of link State routing protocols. Explain how Link State routing protocol can be used to find the shortest path with relevant example. What are its disadvantages? [10]
2.
Why do we use NAT? Explain its different types [5]
Physical Layer and Media
1.
Explain the concept of Binary Amplitude Shift Keying. Represent bit sequence 11001010 by the following waveform a.) Manchester b.) Differential Manchester [10]
2.
What are the major differences between noise, distortion and attenuation? [5]
3.
Explain Time Division Multiplexing with required figure [5]
Transport layer
1.
A ALOHA network transmits 200-h bit frames using a shared channel with 200-kbps bandwidth. Find the throughput if the system considering all stations together produces 250 frames per second. What do you mean by vulnerable time of slotted ALOHA? [5]