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7000 Series L3 Managed Switch Reference Manual for Software v2.0
C-26 Glossary
Web
Also known as World-Wide Web (WWW) or W3. An Internet client-server system to distribute information,
based upon the hypertext transfer protocol (HTTP).
Wide Area Network
A WAN is a computer network that spans a relatively large geographical area. Typically, a WAN consists of
two or more local-area networks (LANs).
Windows Internet Naming Service
WINS. Windows Internet Naming Service is a server process for resolving Windows-based computer names
to IP addresses.
If a remote network contains a WINS server, your Windows PCs can gather information from that WINS
server about its local hosts. This allows your PCs to browse that remote network using the Windows
Network Neighborhood feature.
WINS
WINS. Windows Internet Naming Service is a server process for resolving Windows-based computer names
to IP addresses.
X
X.500
A directory standard that enables applications like e-mail to access information that can either be central or
distributed. The benefit of a directory is the ability to minimize the impact on the user of changes to a
network. The standard is broken down under subsequent standards, as follows:
X.501 Models
X.509 Authentication framework
X.511 Abstract service definition
X.518 Procedures for distributed operation
X.519 Protocol specifications
X.520 Selected attribute types
X.521 Selected object types
XModem
One of the most popular file transfer protocols (FTPs). Xmodem is fairly effective at detecting errors. It
sends blocks of data together with a checksum and then waits for acknowledgment of the block's receipt.
The waiting slows down the rate of data transmission considerably, but it ensures accurate transmission.
Xmodem can be implemented either in software or in hardware. Many modems, and almost all
communications software packages, support Xmodem. However, it is useful only at relatively slow data
transmission speeds (less than 4,800 bps). Enhanced versions of Xmodem that work at higher transmission
speeds are known as Ymodem and Zmodem.