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200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Wireless Antennas 802.11 Standards Wireless Signal Interference Wireless Networks Wireless Terminology 100 200 300 400 500 Wireless Facts 100 200 300 400 500 Wireless Trivia 600 700 Bonus 600 700 Bonus 600 700 Bonus 600 700 Bonus 600 700 Bonus 600 700 Bonus 600 700 Bonus
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What antenna is ideal for short and medium range?
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Semi-Directional
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What is the area centered on the visible LOS between the transmitting and receiving antenna?
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Fresnel Zone
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Antennas convert electrical energy into in a transmitting antenna
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RF Waves
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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
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4
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What are the basic Wireless antenna types
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1. Omni-Directional 2. Semi-Directional 3. Highly-Directional
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The communications standard for WIMAX is the standardThe communications standard for WIMAX is the standard.
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802.16
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What is the 802 standard for Bluetooth
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IEEE 802.15
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What standard utilizes 150 feet as it’s wireless transmission
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802.11a
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The 802.11 state machine has three distinct states
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Authenticated and Associated Unauthenticated and Unassociated Authenticated and unassociated
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WIMAX can transmit at speeds up to 75Mbps as far as miles away
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Rain, Snow, Smog, and Smoke are examples of weather that will Wireless
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Impair
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What medium is the most dependable and has the less interference problems
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Fiber-Optics
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What type of weather effects RF signals the most
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Heavy Rain
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Hidden Node is most likely due to
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Decreased Signal
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Amplitude happens at the
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Receiver
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When you network is within a city, but is installed upon a campus then it is a
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CAN
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Network that exist within a user’s home are called
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PAN
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What does SOHO stand for
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Small office/home office
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What Network topology has all nodes connected together in a circular pattern?
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RING
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What Network Topology is used for most common networks
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STAR
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Free Space path loss is also called
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Path loss
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What is the term used for adding a few extra dB of signal strength to the link budget
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Fade Margin
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What deffines a common set of rules for a network
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Protocol
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What parameter should be taken into account to secure a company’s Network
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Security Policy
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What elects one machine as the base station or master in a ad Hoc architecture
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Spokesman Election Algorithm
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Which two Agencies control communications for wireless or any other communications medium
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FCC and IEEE
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LANS were limited to the physical, hardwired of the building
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Infrastructure
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The Ethernet project was established by in the eary 1970’s
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Xerox
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The major motivation and benefit from wireless LANs is increased
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Mobility
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What is the main purpose of an Access point
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A Cabinet or area that connects end users
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Earth Bulge is considered within what parametersEarth Bulge is considered within what parameters.
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Long Distance Links
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The elect one machine as the base station or master in a ad HOC architecture
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Spokesman election algorithm
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With increased mobility, wireless LANs will also offer increased?
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Flexibility
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CSMA/CA (carrier sense multiple access with collision avoidance) uses a random factor to determine the time it takes to transmit a data packet
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Backoff
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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.
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Infrastructure
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A method of delivering DC voltages to an access point over CAT-5
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POE
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What are examples of wireless devices used today for communications
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Pagers, Cellular Telephones, Satellite systems
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USB Adapters come in two major form factors
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Wired and Dongle
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OFDM reduces the amount of in signal transmissions
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Crosstalk
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What network layer handles the transmission between nodes or computers
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ACCESS
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What are the two types of spread spectrum?
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DSSS and FHSS
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For Omni-directional antennas, Point-to-Point (PtMP) will use what common bandwidth
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2.4 GHz
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What device can be used to extend a wireless network past it’s maximum distance
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Wireless Router
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The process of listening for beacons on each channel for a specific period of time is?
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Passive Scanning
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A is a group of two or more computer systems linked together
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Network
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Is a standard that is used for long distance broadband connections?Is a standard that is used for long distance broadband connections?
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WIMAX
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Extreme altitude change and also temperature change is know as?
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Air Stratification
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The Range of a link is directly related to the?
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Output Power
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What characteristics utilize decibels
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Signal Stregth, Signal to Noise Ratio or (SNR), and Noise Floor.
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A will determine if a packet has been received successfully. Then the receiving node will send an (ACK) Acknowledge packet.
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(CRC) Cyclic redundancy check
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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
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RTS
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What signal carrier is the most stable, but must have line-of-site transmission of no more than 50 feet?
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Infrared (IR pulse position modulation)
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Antennas with narrow Beam- width would have to consider to transmit and receive a good signal, on what condition?
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Antenna Alignment
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What device is used by Wireless Network to transmit with out routing a signal?
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Access Points
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An is a network that can be brought up and torn down in a short time
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AD HOC
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Used to convert one frequency range to another?
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Frequency Converter
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Convert IP address to Binary 192.168.241.1
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11000000.10101000.1 1110001.00000001
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Convert Binary to IP address 10000010. 00001010. 01110001.10000001
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130.10.113.129
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Convert Hexadecimal to Binary 9F,
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10011111
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Convert Hexadecimal to Binary 2B
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00101011
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