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$10.00 Wireless Networking

  • From Computer-Science: General-CS
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  • Due on Aug. 28, 2011
  • Asked on Aug. 25, 2011 at 10:25:44AM
Asked by :
lookyheer
lookyheer
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Questions Asked: 31
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Q:

1. What is the wireless spectrum?

2. Name and describe the general characteristics of wireless transmission.

3. Name and describle the two types of WLAN layouts. Which is the most commonly used?

4. Name and describe the MAC sublayer characteristics that all Wi-Fi standards have in common.

5. For each 802.11 standard, list what band it uses, what its throughput is, and what its range is. What are the unique characteristics of the standard that hasn't been ratified at the time the textbook was written?

6. Name and describe the characteristics of the Bluetooth standard. Bluetooth isn't practical for networking. What is it used for?

7. In designing a WLAN, what should you do to determine the placement of access points and what do you need to find out when you do this?

8. Name and describe the five pitfalls to avoid when configuring a WLAN.

9. What is the name used for the 802.16 standards? What are the advantages of it over Wi-Fi? why would an organization choose some other option over this technology?

10. Describe how satellite technology works. Include a description of the different types of satellite orbits, the frequencies they use, and the types of access services.

 

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  • Posted on Aug 25, 2011 at 1:12:53PM
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vivekjha25
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A:
Preview: ... 3.) 802.11b     It uses the 2.4 GHz frequency band. The net bit rates are 5.5 or 11.     Approximate Range is 38m(indoor) and 140m(outdoor).      4.)    802.11g     It uses the 2.4 GHz frequency band. The net bit rates are 6,9,12,18,24,36,48 or 54.     Approx Range is 38m (indoor) and 140m (outdoor). 5.) 802.11n     It uses the 2.4 GHz frequency band as well as the 5 GHz frequency band.     It offers various data rates of 7.2, 14.4, 21.7, 28.9, 43.3, 57.8, 65 or 72.2 for the 2.4 GHz band.     For the 5 GHz band, it has a net bit rate of 15, 30, 45, 60, 90, 120, 135, or 150.     Approx Range is 70m indoor and 250m outdoor.      Answer 6 Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions in the ISM band from 2400-2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. The major characteristics of the Bluetooth Standard are :    - Received Signal Strength Indicator  - Adaptive frequency-hopping spread spectrum(AFH), which improves resistance to radio frequency interference by avoiding the use of crowded frequencies in the hopping sequence.  - Extended Synchronous Connections which improve voice quality of audio links.  - Host Controller Interface support  - Enhanced Data Rate(EDR) introduced in Bluetooth v2.0 for faster data transfer.  - Secure Simple Pairing(SSP)  - Extended inquiry response  - Alternate MAC/PHY (AMP)    Bluetooth isn't practical for networking. It was intended for non-resident equipment and its applications.  The category of applications is outlined as the Wireless Personal Area Network(WPAN).  Bluetooth is a replacement for cabling in a variety of personally carried applications in any setting and can also support fixed location applications .      Answer 7  Proper placement of access points is one of several best practices that should be adhered to in order to unleash the full performance potential of the Wireless Network.  If your coverage area is extremely large,  possibly consisting of thousands of square feet, a scaled building diagram is extremely important in the initial planning process.  An access point's transmission radius is called a cell. Overlapping cells using multiple access points creates seamless access as you roam from one cell to another.  In a setting with overlapping cells, mobile devices and access points frequently check the strength and quality of transmission, handing off users to the access point with the s ...
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