EnGenius Technologies ENH500 - Manual (Page 80)

Coverage Area
The geographical area that can be served by a mobile communications network or system.
Coverage Hole
An area within the radio coverage footprint of a wireless system where the RF signal level is
below the design threshold. Physical obstructions such as buildings, foliage, hills, tunnels, and
indoor parking garages are usually the cause of coverage holes.
Cyclic Redundancy Check (CRC)
A common technique for detecting data transmission errors.
Dynamic Host Configuration Protocol (DHCP)
A protocol that assigns temporary IP addresses automatically to client stations logging onto
an IP network, so the IP addresses do not have to be assigned manually. The ENH500 contains
an internal DHCP server that automatically allocates IP address using a user-defined range of
IP addresses.
Dead Spot
An area within the coverage area of a WLAN where there is no coverage or transmission
falling off. Electronic interference or physical barriers such as hills, tunnels, and indoor parking
garages are usually the cause of dead spots. See also coverage area.
802.11
A category of WLAN standards defined by the Institute of Electrical and Electronics Engineers
(IEEE).
802.11a
An IEEE standard for WLANs that operate at 5 GHz, with data rates up to 54 Mbps.
802.11n
An IEEE standard for WLANs that operates at 5 GHz, with data rate of 300 Mbps. The new
standard also raises the encryption bar to WPA2. The 40 HT option can be added to increase
the data rate.
Encryption
Translates data into a secret code to achieve data security. To read an encrypted file, you must
have a secret key or password for decryption. Unencrypted data is referred to as plain text;
encrypted data is referred to as cipher text
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.