Glossary
Multi-Tech Systems, Inc. RouteFinderVPN RF760/660/600VPN User Guide (PN S000323D) 185
TLS (Transport Layer Security) – An open security standard that is similar to SSL3. (Note that some web sites may not
support the TLS protocol.)
Trace Route – A program available on many systems that traces the path a packet takes to a destination. It is mostly used
to debug routing problems between hosts. A Trace Route protocol is defined in IETF RFC 1393.
Trusted Subnetwork – A subnetwork of hosts and routers that can trust each other not to engage in active or passive
attacks. It is also assumed that the underlying communications channel such as a LAN is not being attacked by any other
means.
Tunneling – Transmitting data that is structured in one protocol within the protocol or format of a different protocol.
UDP (User Datagram Protocol) – A datagram-oriented unreliable communications protocol widely used on the Internet. It is
a layer over the IP protocol. UDP is defined in IETF RFC 768.
UNC (Universal Naming Convention) path – A UNC path (e.g., \\server) is used to help establish a link to a network drive.
URL (Universal Resource Locator) – URLs are used to describe the location of web pages, and are also used in many
other contexts. An example of an URL is http://www.ssh.com/ipsec/index.html. URLs are defined in IETF RFCs 1738 and
1808.
Verification – The act of recognizing that a person or entity is who or what it claims to be.
VLAN (Virtual Local Area Network) – A function allowing some Ethernet switches to be divided into smaller logical groups
known as VLANs. On most switches each VLAN operates completely independent of the others, as if each was a separate
physical device. Some higher-end switches can also route between VLANs as if each was a separate hub/switch connected
by a router.
VPN (Virtual Private Network) – A device or program that protects users and their data when exchanging information over
the Internet. A VPN can use encryption, user authentication, and/or firewall protection to solve remote access security
threats.
WAN (Wide Area Network) – A data network, typically extending a LAN beyond a building or campus, linking to other
(remote) LANs.