2017-18 Sem II Class: BE(IT) Subject: MC Assignment I

MGM’s College of Engineering, Nanded.
Department of IT
Semester II (2017-18)
Class: BE(IT)       Subject: MC         Assignment I
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1.     What different multiplexing techniques are used in wireless communication? Explain in brief.

2.     What are the different spread spectrum techniques in wireless networks? Explain briefly.

3.     Enlist advantages and drawbacks of FDMA and TDMA.

4.     Why IR signals are not generally used and radio signals are used for wireless communications such as wifi and cellular networks?

5.     Give comparison between 802.3 and 802.11.

6.     What is hidden terminal problem? How it is solved?

7.     Enlist characteristics of wireless LANs.

8.      Draw and explain the two types of architectures used in 802.11 networks.

9.     What are the different layers of 802.11 protocol? Explain their functions.

10.  A smartphone downloads an jpeg file of 2MB using FHSS physical interface of wifi having 2Mbps data rate. Calculate the frame size and time required for downloading. Also list the functions of different fields of FHSS packet format.

11.    A laptop uploads mp3 file of 6MB using DSSS physical interface of wifi having 6Mbps data rate. Calculate the frame size and time required for uploading. Also list the functions of different fields of DSSS packet format.

12.   Which access method will be used by five mobile stations sharing a single channel for transmission? Explain in detail.

13.   What are the different IFS used in 802.11 MAC layer? A mobile station is ready with an ACK packet, how long should it wait before transmission using FHSS and DSSS?

14.  What are the different fields present in 802.11 MAC frame format? A smartphone receives a MAC packet on wifi network with the following bits in MAC frame:

0001110000000111

What information is present in this MAC packet?

15.     What is a beacon frame? A laptop and 2 Smartphone’s are present in wifi infrastructure-based network. How synchronization is done using beacon transmission?

16.  What is TIM? How power management is done using DTIM and ATIM in 802.11 networks?

Additional Questions for practice

17.  What are the drawbacks of mobile and wireless communication? Explain.

18.  Give comparison between wireless networks and fixed networks.

19.  Calculate the 802.11 MAC frame size for Q. No. 10 and 11.

20. What additional functions are required for wireless MAC protocol? Why?

21. Draw and explain IEEE 802.11 FHSS frame format.

22. Draw and explain IEEE 802.11 DSSS frame format.

23. What are the design goals of wireless LAN? Why?

24.What are the different digital modulation techniques? Discuss in brief

25.What are the three access methods used by 802.11 standard? Explain in detail.

26.Give comparison between infrared and radio transmission.

27. What are the applications of mobile and wireless communication? Explain in detail.

28.Enlist and explain the components of infrastructure networks of 802.11.

29.State and explain the 3 versions of 802.11 physical layers.

30.What functions are performed by MAC management of 802.11? Discuss in detail.

31.How power management is done in 802.11 infrastructure and ad-hoc networks?

32.Write short note on: (i)Wifi Dual Band (ii) Wifi Direct

Faculty Incharge: Hashmi S A