Assignemnt

Question 1.

a. Identify the important requirements for a wireless LAN.

b. List the different categories of a wireless LAN according to the transmission technique. Write a 100-2000 word description of one of the techniques.

Question 2.

a. List at least four network devices required to implement a WLAN.

b. Describe the role each device plays in the implementation of the WLAN.

c. Describe how an ad-hoc LAN is different from an infrastructure WLAN.

Question 3. Compare and contrast wired and wireless LANs. What are the unique issues that must be addressed when designing a wireless LAN?

Question 4.

a. Identify at least three important security measures you would implement when building a WLAN.

b. Compare and contrast the various technologies for implementing encryption in WLANs.

c. Describe how you would utilize network management tools to facilitate the management and improve the security of a wireless network.

Question 5.

a. List the various Wi-Fi standards available for building a wireless network. Compare and contrast two of the popular standards.

b. Let's assume you are the IT manager of your company, which employs the IEEE 802.11b standard for the wireless infrastructure and supports a data rate of 11 Mbps. Your company wants to expand the network but also wants the new network to support a higher data rate. In addition, your company is planning to run some servers on the new network and the users need to have the ability to access these servers from the old network. What wireless standard would you recommend for the new network? Please justify your choice.

Question 6.

a. Describe the CSMA/CA protocol for multiple access used by WLANs.

b. Explain why it is impractical for WLANs to use the CSMA/CD protocol used in wired Ethernet.

Question 7.

a. A WLAN uses the 1-Mbps IEEE 802.11 infrared standard and the 16-PPM modulation scheme. Compute the period of transmission (time between bits).

b. What is the average time between pulses (1 values) and the corresponding average rate of pulse transmission?

c. Compute the minimum time between adjacent pulses.

d. Compute the maximum time between adjacent pulses.

Question 8.

For IEEE 802.11a standard, describe how the modulation technique and coding rate determine the data rate.

Question 9.

Have you heard about an ad-hoc WLAN? How is it different from an infrastructure WLAN?

Question 10.

Can you describe the multiple access technique used in WLANS? How is it different from the multiple access technique used in wired lans?