Air 802 USB-ADG-2 Guia Para Usuario página 30

802.11b – Specifies a maximum data transfer rate of 11 Mbps, an operating frequency of 2.4
GHz, and WEP encrypion for security. Commonly referred to as Wi‐Fi.
802.11g – Specifies a maximum data transfer rate of 54 Mbps, an operating frequency of 2.4
GHz and is backwards compatible with 802.11b. Commonly referred to as Wi‐Fi.
Access Point – An interworking device that seamlessly connnects wired and wireless networks
together.
Ad‐Hoc – An Ad‐Hoc wireless LAN is a group of computers, each with a WLAN card, connected
as an independent wireless LAN. Ad‐Hoc wireless LAN is applicable at a departmental scale for
branch SOHO operation.
BSS – Basic Service Set is an 802.11 interworking framework that includes an Access Point.
Computers in a BSS must be configured with the same BSSID.
CTS (Clear to Send) – An RS‐232 signal sent from the receiving station to the transmitting
station that indicates is is ready to accept data.
Client – A workstation or PC on a network.
Default Gateway – The IP Address of either the nearest router or server for the LAN.
DHCP – Dynamic Host Configuration Protocol is a method in which IP addresses are assigned
from a pool of IP addresses by a server dynamically to clients on the network. DHCP is used for
Dynamic IP Addressing and requires a dedicated DHCP server on the network.
DNS – Domain Name System is used to map readable machine names (Internet domain names)
into IP addresses.
DSSS – Direct Sequence Spread Spectrum is a method the wireless cards use to transmit data
over the frequency spectrum. The other method is frequency hopping. Direct sequence spreads
the data over one frequency range (channel) while frequency hopping jumps from one narrow
frequency band to another many times per second.
Dynamic IP Adress – An IP address that is automatically assigned to a client station in a TCP/IP
network, generally by a DHCP server. Network devices that serve multiple users, such as servers
and printers, are usually assigned static IP addresses.
ESS – Extended Service Set is a set of two or more BSSs (multiple access points) that form a
single network.
Firmware – Programming code that is written onto read‐only memory (ROM) or programmable
read‐only memory (PROM). Once written into memory, it is retained even after the device is
turned off.
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