Wireless Antennas Standards Wireless Signal Interference Wireless Networks Wireless Terminology Wireless Facts Wireless Trivia Bonus Bonus Bonus Bonus Bonus Bonus Bonus
What antenna is ideal for short and medium range?
Semi-Directional
What is the area centered on the visible LOS between the transmitting and receiving antenna?
Fresnel Zone
Antennas convert electrical energy into in a transmitting antenna
RF Waves
The FCC allows for up to watts of power to be radiated from an antenna in a point-to-multipoint wireless LAN using 2.4GHz
4
What are the basic Wireless antenna types
1. Omni-Directional 2. Semi-Directional 3. Highly-Directional
The communications standard for WIMAX is the standardThe communications standard for WIMAX is the standard.
802.16
What is the 802 standard for Bluetooth
IEEE
What standard utilizes 150 feet as it’s wireless transmission
802.11a
The state machine has three distinct states
Authenticated and Associated Unauthenticated and Unassociated Authenticated and unassociated
WIMAX can transmit at speeds up to 75Mbps as far as miles away
30
Rain, Snow, Smog, and Smoke are examples of weather that will Wireless
Impair
What medium is the most dependable and has the less interference problems
Fiber-Optics
What type of weather effects RF signals the most
Heavy Rain
Hidden Node is most likely due to
Decreased Signal
Amplitude happens at the
Receiver
When you network is within a city, but is installed upon a campus then it is a
CAN
Network that exist within a user’s home are called
PAN
What does SOHO stand for
Small office/home office
What Network topology has all nodes connected together in a circular pattern?
RING
What Network Topology is used for most common networks
STAR
Free Space path loss is also called
Path loss
What is the term used for adding a few extra dB of signal strength to the link budget
Fade Margin
What deffines a common set of rules for a network
Protocol
What parameter should be taken into account to secure a company’s Network
Security Policy
What elects one machine as the base station or master in a ad Hoc architecture
Spokesman Election Algorithm
Which two Agencies control communications for wireless or any other communications medium
FCC and IEEE
LANS were limited to the physical, hardwired of the building
Infrastructure
The Ethernet project was established by in the eary 1970’s
Xerox
The major motivation and benefit from wireless LANs is increased
Mobility
What is the main purpose of an Access point
A Cabinet or area that connects end users
Earth Bulge is considered within what parametersEarth Bulge is considered within what parameters.
Long Distance Links
The elect one machine as the base station or master in a ad HOC architecture
Spokesman election algorithm
With increased mobility, wireless LANs will also offer increased?
Flexibility
CSMA/CA (carrier sense multiple access with collision avoidance) uses a random factor to determine the time it takes to transmit a data packet
Backoff
The architecture uses fixed network access points that are sometimes connected to landlines, wireless hubs and wireless routersThe architecture uses fixed network access points that are sometimes connected to landlines, wireless hubs and wireless routers.
Infrastructure
A method of delivering DC voltages to an access point over CAT-5
POE
What are examples of wireless devices used today for communications
Pagers, Cellular Telephones, Satellite systems
USB Adapters come in two major form factors
Wired and Dongle
OFDM reduces the amount of in signal transmissions
Crosstalk
What network layer handles the transmission between nodes or computers
ACCESS
What are the two types of spread spectrum?
DSSS and FHSS
For Omni-directional antennas, Point-to-Point (PtMP) will use what common bandwidth
2.4 GHz
What device can be used to extend a wireless network past it’s maximum distance
Wireless Router
The process of listening for beacons on each channel for a specific period of time is?
Passive Scanning
A is a group of two or more computer systems linked together
Network
Is a standard that is used for long distance broadband connections?Is a standard that is used for long distance broadband connections?
WIMAX
Extreme altitude change and also temperature change is know as?
Air Stratification
The Range of a link is directly related to the?
Output Power
What characteristics utilize decibels
Signal Stregth, Signal to Noise Ratio or (SNR), and Noise Floor.
A will determine if a packet has been received successfully. Then the receiving node will send an (ACK) Acknowledge packet.
(CRC) Cyclic redundancy check
A transmitting node or computer will send it’s packet only if the packet is heard by the receiving PC and the receiving PC will then send its CTS packet
RTS
What signal carrier is the most stable, but must have line-of-site transmission of no more than 50 feet?
Infrared (IR pulse position modulation)
Antennas with narrow Beam- width would have to consider to transmit and receive a good signal, on what condition?
Antenna Alignment
What device is used by Wireless Network to transmit with out routing a signal?
Access Points
An is a network that can be brought up and torn down in a short time
AD HOC
Used to convert one frequency range to another?
Frequency Converter
Convert IP address to Binary
Convert Binary to IP address
Convert Hexadecimal to Binary 9F,
Convert Hexadecimal to Binary 2B