IOGear Wireless-N GWU623, Руководство по установке, Страница: 60 / 76

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DHCP
Dynamic Host Con fi guration Protocol - a method in which IP addresses are assigned by server
dynamically to clients on the network. DHCP is used for Dynamic IP Addressing and requires a dedicated
DHCP server on the network.
Direct Sequence Spread Spectrum
This is the 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.
ESSID
An Infrastructure con fi guration could also support roaming capability for mobile workers. More than one
BSS can be con fi gured as an Extended Service Set (ESS). Users within an ESS could roam freely between
BSSs while served as a continuous connection to the network wireless stations and Access Points within
an ESS must be con
fi gured with the same ESSID and the same radio channel.