Transcript No Slide Title

Wireless
Antennas
802.11
Standards
Wireless
Signal
Interference
Wireless
Networks
Wireless
Terminology
Wireless
Facts
Wireless
Trivia
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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
standard.
802.16
What is the 802 standard
for Bluetooth
IEEE 802.15
What standard utilizes 150 feet
as it’s wireless transmission
802.11a
The 802.11 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
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 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 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
signal transmissions
in
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?
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 Beamwidth 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 192.168.241.1
11000000.10101000.1
1110001.00000001
Convert Binary to IP address
10000010. 00001010.
01110001.10000001
130.10.113.129
Convert Hexadecimal to Binary
9F,
10011111
Convert Hexadecimal to Binary
2B
00101011