Networking

1200 Words5 Pages
1. List two advantages of wireless networking. User mobility in the workplace, and cost effective networking media for use in areas that are difficult or too costly to wire. 2. What are the three areas defined for the IEEE 802.11 standard? Physical Layer (PHY): The method of transmitting the data, which may be either RF or infrared (although infrared is rarely used.) Medium Access Control (MAC): The reliability of the data service, access control to the shared wireless medium, protecting the privacy of the transmitted data. MAC management protocols and services: Authentication, association, data delivery, and privacy. 3. What is an ad hoc network? In this network, the wireless clients (stations) communicate directly with each…show more content…
23. What is the purpose of the paging procedure in Bluetooth? The paging procedure is used to establish and synchronize a connection between two Bluetooth devices. 24. Define the term backscatter. It refers to the reflection of the radio waves striking the RFID tag and reflecting back to the transmitter source with its stored unique identification information. 25. What are the three parameters that define an RFID system? Means of powering the tag, frequency of operation, and communications protocol (also called the air interface protocol). 26. Explain how power is provided to a passive RFID tag. By rectifying the RF energy transmitted from the reader which strikes the RF tag antenna. 27. Cite three advantages for using an active RFID tag. The power consumption of the G2C501 is 10μA in the sleep mode and uses two AA batteries with an expected lifetime of five years, it works in the standard 915 MHz range, and it also has location capability. 28. What are the three frequency bands typically used for RFID tags? Low Frequency, High Frequency, and Ultra-High Frequency. 29. What is the WiMax frequency standard for the United States? Unlicensed: 5.8GHz and licensed: 2.5 GHz spectrum. 30. Why was OFDM selected for WiMax? This signaling format was selected for the WiMAX standard IEEE 802.16a standard because of its improved NLOS (non line-of-sight) characteristics in
Open Document