Chapter 1 Flashcards
ITU-R
International Telecommunication Union Radiocommunication Sector
Set the rules for what the user can do with a radio transmitter.
FCC
Federal Communications Commission
Set the rules for what the user can do with a radio transmitter.
What can ITU-R and FCC do?
These organizations manage and regulate frequencies, power levels, and transmission methods.
IEEE
International Electrical and Electronics Engineers.
Create standards for compatibility and coexistence between networking equipment.
IETF
Internet Engineering Task Force
Responsible for creating Internet Standards
Wi-Fi Alliance
Performs certification testing to make sure wireless networking equipment conforms to the 802.11 WLAN communication guidelines.
ISO
The International Organization of Standarization
Created OSI model for data communications
FCC regulates?
Frequency Bandwidth Maximum power of IR Maximum EIRP (Equivalent Isotropically Radiated Power) Use (Indoor/Outdoor)
IETF is a part of what?
ISOC
Internet Society groups
Internet Architecture Board
Internet Corporation for Assigned Names and Numbers
Internet Engineering Steering Group
Internet Research Task Force
4 Generations of Wifi
- 11a
- 11b
- 11g
- 11n
802.11a
5Ghz, 54 mbps
802.11b
2.4Ghz, 11Mbps
802.11g
2.4Ghz, 54Mbps
802.11n
2.4Ghz, 5Ghz, 450Mbps
OSI Model Layers
Application Presentation Session Transport Network Data-Link Physical
What is Amplitude?
Amplitude is the height, force, power of the wave.
What is a Keying Method?
A keying method is what changes a signal into carrier signal. It provides the signal with the ability to encode data so that it can be communicated or transported.
3 Types of Keying methods?
Amplitude-Shift Keying
Frequency-Shift Keying
Phase-Shift Keying
802.11 Technology is Typically Deployed at which fundamental layer of network architecture?
Access
Which organization is responsible for enforcing maximum transmit power rules in an unlicensed frequency band?
FCC
802.11 Wireless Bridge Links are typically associated with which network architecture layer?
Distribution
The 802.11-2007 standard was created by which organiation?
All 802 standards were created by IEEE
What organization ensures interoperability of WLAN products?
Wi-Fi alliance
What type of signal is required to carry data?
Carrier Data
Which keying method is most susceptible to interference from noise?
ASK
Which sublayer of the OSi model’s Data-Link layer is used for communication between 802.11 radios?
MAC
What IETF is responsible for?
RFC documents
The Wi-FI alliance is responsible for which of the following certification programs?
WMM
Which wave properties can be modulated to encode data?
Amplitude
Frequency
Phase
The IEE 802.11-2007 standard defines communication mechanism at which layers of the OSI model?
Physical
Data-Link
The Wi-Fi Alliance is responsible for which of the following certification programs?
Voice Personal
WMM-PS
What are the advantages of using unlicensed frequency bands for RF transmissions?
There are no additional financial cost.
Anyone can use the frequency band
How many layers does OSI have?
7 layers
