User's Manual

Part # 34357-MNL Rev.03 SPEEDLAN 9200 User Guide
Glossary-12
MDS (RIP2 MD5 Authentication)
When RIP2 is used with an authentication algorithm, such as MD5, network security is increased since the
destination receiving the RIP packet knows that it was generated by a reliable source (i.e., the actual sender
of the packet). RIP2-MD5 authentication transmits the output of the authentication algorithm rather than the
RIP2 authentication key. Therefore, the RIP2 authentication key is never transmitted over the network and
cannot be heard by other routers. This means a router can determine exactly who sent the message and not
assume which router sent it.
Mean Time Between Failure (MTBF)
This is defined by a specific set of calculations. The formula of the system longevity is based on the thermal,
electrical and environmental stresses on each component.
MHz (MegaHertz)
Millions of Hertz.
Modulation
The process of varying characteristics of a carrier signal to represent changes in the transmitted information.
MOdulator-DEModulator (MODEM)
A device that converts a digital signal to analog, or vice versa, and is used to transfer data between
computers over communications lines.
Mb/s
Million of samples per second.
Multi-path fading
The condition in which the “true” signal from an antenna reflects off an object (usually the ground) and, as a
result, the reflected signal causes destructive interference at the receiving antenna. Multi-path fading affects
linearly polarized signals more than circularly polarized signals.
Network Address Translation (NAT)
NAT helps to ensure network security and allows an entire company to share a single global IP address for
communication on the Internet. This enables companies to communicate with other devices on the Internet.
Network
A set of connections that allow them to exchange data with each other, which enables multiple users to share
to communicate data through the accepted path(s). Two or more locations tied together with equipment and
communications channels.