. 1. What does a beacon frame do? Explain.

2. What are the differences between a master device in Bluetooth, and a base station in 802.11? 3. Download RFC 5944 (http://www.rfc-editor.org/), and answer the following questions: a. What organization did the editor of RFC 5944 work for?

b. How is that organization different from the authors of many Internet protocol RFCs, such as TCP, IP, UDP, etc.?

c. Also from that RFC, what is a "co-located care-of address"?

d. If you're using such a thing, who performs decapsulation of the datagrams?

e. How long does an extension have to be before the Long Extension Format is used?

4. Research two advanced (i.e. new, expensive) cell phones from different brands. You may need to download user manuals or find other technical documentation. For each, describe: a. The make and model of the phone b. What frequency band it uses c. What type of phone standards it uses (GSM, IS-95, CDMA, etc.). [Don't tell me it uses AAC or 802.11g – those aren't phone standards!] d. If the encoding wasn't described in the lecture, describe it briefly (what other protocols is it based on, where is it used, etc.) e. Cite the sources used

For one example, I found a Nokia E70 cell phone, which uses EGSM 850/1800/1900 for frequency and encoding. The phone was described at http://nds2.nokia.com/files/support/nam/phones/guides/E70_US_en.PDF, and the EGSM encoding was described at http://www.cellsea.com/java-cellsea/glossary/EGSM.htm. Now you can't use that one. EGSM is an Extended GSM used in Europe, clearly therefore based on GSM, and uses frequencies around 900 MHz and 1800 or 1900 MHz.

5. When is an anchor MSC used in a GSM network?

6. What are the differences between infrastructure and ad hoc modes in 802.11?