3Com 3CRWE870075A User Guide - Page 12

CSMA/CA, Ethernet, Infrastructure, Roaming, RTS Threshold

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applications, each cell or micro-cell has its own base station; each base station in turn is interconnected with other cells' bases. BSS-Basic Service Set. It is an access point and all the LAN PCs that are associated with it. CSMA/CA-Carrier Sense Multiple Access with Collision Avoidance. EAP-Extensible Authentication Protocol, which provides a generalized framework for several different authentication methods. ESS-Extended Service Set. More than one BSS is configured to become an ESS. LAN mobile users can roam between different BSSs in an ESS (ESS-ID, SSID). Ethernet-A popular local area data communications network, which accepts transmission from computers and terminals. Infrastructure-An integrated wireless and wired LAN is called an infrastructure configuration. Roaming-A wireless LAN mobile user moves around an ESS and maintains a continuous connection to the infrastructure network. RTS Threshold-Transmitters contending for the medium may not be aware of each other (they are "hidden nodes"). The RTS/CTS mechanism can solve this problem. If the packet size is smaller than the preset RTS Threshold size, the RTS/CTS mechanism will not be enabled. VLAN-Virtual Local Area Network. A LAN consisting of groups of hosts that are on physically different segments but that communicate as though they were on the same segment. WEP-Wired Equivalent Privacy is based on the use of security keys and the popular RC4 encryption algorithm. Wireless devices without a valid WEP key will be excluded from network traffic. WPA-Wi-Fi Protected Access. 12

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applications, each cell or micro-cell has its own base station; each base station in
turn is interconnected with other cells’ bases.
BSS
—Basic Service Set. It is an access point and all the LAN PCs that are
associated with it.
CSMA/CA
—Carrier Sense Multiple Access with Collision Avoidance.
EAP
—Extensible Authentication Protocol, which provides a generalized
framework for several different authentication methods.
ESS
—Extended Service Set. More than one BSS is configured to become an ESS.
LAN mobile users can roam between different BSSs in an ESS (ESS-ID, SSID).
Ethernet
—A popular local area data communications network, which accepts
transmission from computers and terminals.
Infrastructure
—An integrated wireless and wired LAN is called an
infrastructure configuration.
Roaming
—A wireless LAN mobile user moves around an ESS and maintains a
continuous connection to the infrastructure network.
RTS Threshold
—Transmitters contending for the medium may not be aware of
each other (they are “hidden nodes”). The RTS/CTS mechanism can solve this
problem. If the packet size is smaller than the preset RTS Threshold size, the
RTS/CTS mechanism will not be enabled.
VLAN
—Virtual Local Area Network. A LAN consisting of groups of hosts that are
on physically different segments but that communicate as though they were on
the same segment.
WEP
—Wired Equivalent Privacy is based on the use of security keys and the
popular RC4 encryption algorithm. Wireless devices without a valid WEP key will
be excluded from network traffic.
WPA
—Wi-Fi Protected Access.