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Psion Teklogix 9160 G2 Wireless Gateway User Manual E-29
Appendix E: Glossary
VLAN
document (possibly stored on another computer). The first part of the URL indicates
what protocol to use and the second part specifies the IP address or the domain name
where that resource is located.
For example,
ftp://ftp.devicescape.com/downloads/myfile.tar.gz
specifies a file that should
be fetched using the FTP protocol;
http://www.devicescape.com/index.html
specifies a Web
page that should be fetched using the HTTP protocol.
V
VLAN
A virtual LAN (VLAN) is a software-based, logical grouping of devices on a
network that allow them to act as if they are connected to a single physical network,
even though they may not be. The nodes in a VLAN share resources and bandwidth,
and are isolated on that network. The 9160 G2 Wireless Gateway supports the
configuration of a wireless VLAN. This technology is leveraged on the access point
for the “virtual” guest network feature.
VPN
A Virtual Private Network (VPN) is a network that uses the Internet to connect its
nodes. It uses encryption and other mechanisms to ensure that only authorized users
can access its nodes and that data cannot be intercepted.
W
WAN
A Wide Area Network (WAN) is a communications network that spans a relatively
large geographical area, extending over distances greater than one kilometer. A
WAN is often connected through public networks, such as the telephone system. It
can also be connected through leased lines or satellites.
The Internet is essentially a very large WAN.