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CompTia Network + Network Installation and Configuration P1
Wireless networks components and standards
45
Computer Networking
Professional
01/22/2015

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Term
point to point communication
Definition
a direct connection between two nodes. data transmitted by one node goes directly to the other
Term
point to point wireless connections
Definition
used to link distant buildings or networks as a part of a controller area network
Term
multipoint communication
Definition
connections between many nodes.
Term
broadcast communication
Definition
data goes from a source node to all other nodes on a network. each node receives data and acts on it
Term
broadcast radio
Definition
form of RF networking that's non-directional, uses a single frequency for transmissions, and comes in low and high power versions
Term
low power RF transmissions
Definition
travel over only a short distance, often no more than 70 meters, and are inexpensive and relatively easy to install
Term
High power RF transmissions
Definition
travel over longer distances. However, specially trained technicians are often required to install this type of system.
Term
spread spectrum
Definition
form of radio transmission in which a signal can be sent over more than one frequency
Term
frequency hopping spread spectrum, FHSS
Definition
sends signal on one channel at a time, while the channel changes at fixed predetermined intervals
Term
direct sequence spread spectrum, DSSS
Definition
uses multiple channels simultaneously to send data
Term
wireless transmissions
Definition
RF, Infrared, Bluetooth, and microwave
Term
Infrared transmissions
Definition
wireless transmissions over unbounded media in which signals are sent as pulse of infrared light. transmits at frequencies between 300 GHz and 300000 GHz
Term
infrared wireless networking transmission rates
Definition
10 and 16 Mbps
Term
serial infrared, SIR
Definition
discovery and negotiation of data connections are preformed at 9.6 Kbps, and speeds vary from 9.6 to 115.2 Kbps
Term
Medium Infrared, MIR
Definition
unofficial reference to data transmission speeds between 0.576 and 1.152 Mbps
Term
fast infrared, FIR
Definition
used to describe data transmission rates of 4 Mbps
Term
very fast infrared, vFIR
Definition
supports data transmission speeds of up to 16 Mbps
Term
Bluetooth
Definition
facilitates short-range wireless communication, between devices such as personal computers, laptops, cell phones, and gaming consoles
Term
Bluetooth 1.1
Definition
uses the 2.4 GHz spectrum to communicate at 1 Mbps connection between two devices
Term
Bluetooth 2.0
Definition
supports an overall data rate of 2.1 to 3 Mbps, and allows for communicating devices to be as far as 100 feet (30M) apart
Term
microwave transmissions
Definition
form of point to point wireless transmissions. sends signals via pulse of electromagnetic energy in the microwave region, at a frequency range of 1Ghz to 300 GHz
Term
WLANs have several common components
Definition
stations(STA),access points(AP),service set, distribution system
Term
station(STA)
Definition
a device that connects an IEEE 802.11 conformant MAC interface to a wireless medium with an Ethernet like driver interface. contains an adapter card, a PC card, or an embedded device to provide wireless connectivity
Term
access point
Definition
a device or piece of software that facilitates communication and provides enhanced security to wireless devices, also extends the physical range of a WLAN, functions as a bridge between wireless STAs and the wired backbone
Term
service set
Definition
defines the way a WLAN is configured
Term
basic service set, BSS
Definition
is a set of devices with an AP connected to a wired networked and one or more wireless stations or clients
Term
Independent Basic service, IBBS
Definition
is a peer to peer network in which each wireless station acts as both a client and a wireless AP.
Term
extended service set, ESS
Definition
is configuration of multiple BSS used to support user mobility on a wireless network
Term
distribution system, DS
Definition
is a wired connection between a BSS and a premise-wide network. this system provides mobile access to available network resources
Term
wireless antenna
Definition
is a device that converts high frequency signals on a cable into electromagnetic waves, and vice versa in wireless communications
Term
gain
Definition
refer to the ratio between the input and output power of a radio antenna.
Term
directional
Definition
used in a point to point network to connect one station to another
Term
Omni-directional
Definition
used in multipoint and distributed networks
Term
802.11
Definition
2Mbps, 2.4GHz, 300 feet
Term
802.11a
Definition
54mbps, 5GHz, 150feet not compatible with b or g
Term
802.11b
Definition
11mbps, 2.4GHz, indoor transmission range 125 feet
Term
802.11g
Definition
54Mbps, 2.4 GHz, indoor transmission range 125 feet. is backward compatible with 802.11b
Term
802.11n
Definition
150Mbps, 2.4/5GHz, 225 feet, backward compatible with 802.11g
Term
three channels provide optimum performance. in 802.11b and g
Definition
1,6,11
Term
Infrastructure mode
Definition
uses one or more APs to connect workstations to the cable backbone.
Term
ad-hoc mode
Definition
uses peer to peer configuration in which each wireless workstation talks directly to other worstations
Term
802.22
Definition
used in rural areas, uses the used or white spaces in television bands between 54 and 862 MHz
Term
system topology for the 802.22 standard
Definition
a point to point multipoint system containing a base station that links to a number of users within a cell
Term
coverage area for the 802.22 standard
Definition
may extend up to about 60 milles
Term
system capacity for the 802.22 standard
Definition
is similar in performance to DSL services
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