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ESS ID
The unique identifier for an ESS. All Access Points and their associated wireless stations in the same
group must have the same ESSID.
Footprint
Geographical areas where an entity is licensed to broadcast its signal.
Gateway
A computer system or other device that acts as a translator between two systems that use different
communication protocols, data formatting structures, languages, and/or architecture.
HT mode
In the 802.11n system, two new formats, called High Throughput (HT), are defined for the Physical Layer,
Mixed Mode, and Green Field. If a system runs 40 HT, two adjacent 20 MHz channels are used. The larger
40 MHz bandwidth can provide better transmit quality and speed.
Keys
Like passwords, keys open (decrypt) and close (encrypt) messages. While many encryption algorithms
are commonly known and public, the key must be kept secret.
Local-Area Network (LAN)
A small data network covering a limited area, such as a building or group of buildings. Most LANs
connect workstations or personal computers. LANs let many users share devices such as printers as well
as data. LANs also facilitate communication through e-mail or chat sessions.
Media Access Control (MAC) Address
Address associated with every hardware device on the network. Every 802.11 wireless device has its own
specific MAC address. This unique identifier is hard-coded into the device and can be used to provide
security for WLANs. When a network uses a MAC table, only the 802.11 radios that have their MAC
addresses added to that network's MAC table can access the network.
Network Address Translation (NAT)
An Internet standard that lets a LAN use one set of IP addresses for internal traffic and a second set of
addresses for external traffic.
Network Time Protocol (NTP)
A protocol that lets devices synchronize their time with a time server. NTP uses TCP or UDP port 123 by
default.
Passphrase
A text string that automatically generates WEP keys on wireless client adapters.
Power Over Ethernet (PoE)
A PoE provides power to PoE-enabled devices using an 8-pin CAT 5 Ethernet cable, eliminating the need
for a power source.
