Friday 18 May 2012

Wireless Network(8th Semester B.Tech Kerala University Questions

Module-I(4 marks)
  1. Write differences between wired fixed and wireless methods?
  2. Why base band signals cannot be directly transmitted in a wireless systems?
  3. Explain the principle of packet switching?
  4. List the security services offered by GSM?
  5. Explain Space Division Multiplexing and Frequency Division Multiplexing?
  6. Draw TCP/IP protocol stack and mention functions of each layer?
  7. What is the channel capacity for a teleprinter channel with 300 Hz bandwidth and a signal to noise ratio of 3dB,where the noise is white thermal noise?
  8. Is a directional antenna useful for mobile phone?Why?how can the gain of an antenna can be improved?
  9. How is channel capacity related to Bandwidth in noise free as well as noisy transmission channels?
  10. List the differences in media characteristics for wireless systems when compared to wired systems?
  11. What are the various types of antennas used for free space propagation in wireless networks?