Glossary
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VTP
VLAN Trunk Protocol: Used to update switches in a switch fabric
about VLANs configured on a VTP server. VTP devices can be a VTP server,
client, or transparent device. Servers update clients. Transparent devices are
only local devices and do not share information with VTP clients. VTPs send
VLAN information down trunked links only.
VTP transparent mode
Switch mode that receives VLAN Trunk Protocol
VLAN information and passes it on, but doesn't read the information.
WAN
wide area network: Is a designation used to connect LANs together
across a DCE (data communications equipment) network. Typically, a
WAN is a leased line or dial-up connection across a PSTN network. Exam-
ples of WAN protocols include Frame Relay, PPP, ISDN, and HDLC.
wildcard
Used with access-list, supernetting, and OSPF configurations.
Wildcards are designations used to identify a range of subnets.
windowing
Flow-control method used with TCP at the Transport layer of
the OSI model.
WINS
Windows Internet Name Service: Name resolution database for
NetBIOS names to TCP/IP address.
WinSock
Windows Socket Interface: A software interface that makes it
possible for an assortment of applications to use and share an Internet
connection. The WinSock software consists of a dynamic link library
(DLL) with supporting programs such as a dialer program that initiates
the connection.
workgroup switching
A switching method that supplies high-speed
(100Mbps) transparent bridging between Ethernet networks as well as high-
speed translational bridging between Ethernet and CDDI or FDDI.
X Window
A distributed multitasking windowing and graphics system
originally developed by MIT for communication between X terminals and
Unix workstations.
X.25
An ITU-T packet-relay standard that defines communication
between DTE and DCE network devices. X.25 uses a reliable Data Link
layer protocol called LAPB. X.25 also uses PLP at the Network layer. X.25
has mostly been replaced by Frame Relay.
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