D-Link DWS-1008 - AirPremier MobileLAN Switch Product Manual page 480

frequency-hopping spread-spectrum - See FHSS.
GBIC - Gigabit interface converter. A hot-swappable input/output device that plugs into a gigabit Ethernet
port, to link the port with a fiber-optic or copper network. The data transfer rate is 1 gigabit per second
(Gbps) or more. Typically employed as high-speed interfaces, GBICs allow you to easily configure and
upgrade communications networks.
gigabit interface converter - See GBIC.
glob - See MAC address glob; user glob; VLAN glob.
GMK - Group master key. A cryptographic key used to derive a group transient key (GTK) for the
Temporal Key Integrity Protocol (TKIP) and Advanced Encryption Standard (AES).
greenfield network - An original deployment of a telecommunications network.
GRE tunnel - A virtual link between two remote points on a network, created by means of the Generic
Routing Encapsulation (GRE) tunneling protocol. GRE encapsulates packets within a transport protocol
supported by the network.
GTK - Group transient key. A cryptographic key used to encrypt broadcast and multicast packets for
transmissions using the Temporal Key Integrity Protocol (TKIP) and Advanced Encryption Standard
(AES).
group master key - See GMK.
group transient key - See GTK.
H.323 - A set of International Telecommunications Union Telecommunication Standardization Sector
(ITU-T) standards that define a framework for the transmission of real-time voice signals over IP packet-
switched networks.
hash - A one-way algorithm from whose output the input is computationally infeasible to determine.
With a good hashing algorithm you can produce identical output from two identical inputs, but finding
two different inputs that produce the same output is computationally infeasible. Hash functions are used
widely in authentication algorithms and for key derivation procedures.
HiperLAN - High-performance radio local area network. A set of wireless LAN (WLAN) communication
standards used primarily in European countries and adopted by the European Telecommunications
Standards Institute (ETSI).
HMAC - Hashed message authentication code. A function, defined in RFC 2104, for keyed hashing for
message authentication. HMAC is used with MD5 and the secure hash algorithm (SHA).
hashed message authentication code - See HMAC.
Hewlett-Packard Open View - See HPOV.
D-Link DWS-1008 User Manual 1