D-Link DWS-1008 User Manual page 425

DWS-1008 User's Manual
forwarding database (FDB)
A database maintained on a DWS-1008 switch for the purpose of making Layer 2 forwarding
and filtering decisions. Each entry consists of the media access control (MAC) address of
a source or destination device, an identifier for the port on which the source or destination
station is located, and an identifier for the virtual LAN (VLAN) to which the device belongs.
FDB entries are either permanent (never deleted), static (not aged, but deleted when the
switch is restarted or loses power), or dynamic (learned dynamically and removed through
aging or when the switch is restarted or loses power).
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.
D-Link Systems, Inc.
Appendix D - Glossary
420