1–4 MULTINET4 MULTI-PORT SERIAL SERVER & MANAGED SWITCH – INSTRUCTION MANUAL
GLOSSARY CHAPTER 1: GLOSSARY
Modbus A communications protocol using master/slave architecture. A
commonly available means of connecting industrial electronic
devices.
NAPT See NAT.
NAT Network Address Port Translation. A method of using a single public IP
address to provide internet access to multiple private IP addresses.
NNI Network to Network Interface.
NSSA Not So Stubby Area is an OSPF area with a limited ability to import
external routes and transmit them to the OSPF backbone.
OSPF Open Shortest Path First. A routing protocol to determine the best
path for traffic over a TCP/IP network.
PAP Password Authentication Protocol. An authentication protocol using
unencrypted ASCII passwords over a network.
Path Cost A Spanning Tree parameter that measures how close bridges are to
one another. It takes into account the bandwidth of the links between
bridges.
PEM Privacy Enhanced Mail File format. A standard for secure e-mail on the
Internet.
PFS Perfect Forward Secrecy. A property of public key cryptography
whereby the compromise of one key does not lead to the compromise
of any other keys.
PoE Power over Ethernet. A technology for delivering power (along with
data) to remote devices over the twisted pair cabling of an Ethernet
network.
PVC A point-to-point connection that is established before its first use and
maintained regardless of the level of activity.
PVID Port VID. A user configurable parameter that associates a native VLAN
with a port. Each port is assigned exactly one PVID. By default, each
port is assigned PVID 1.
QoS Quality of Service. Technology and techniques, such as prioritization,
to ensure the predictable handling of specified kinds of traffic.
RADIUS Remote Authentication Dial-In User Service. An AAA (authentication,
authorization and accounting) protocol using a challenge/response
method for authentication.
RC4 A stream cipher commonly used with SSL and in wireless networks.
RIP Routing Information Protocol. An Interior Gateway Protocol (IGP)
routing protocol used on internal networks. It determines a route
based on the smallest hop count between source and destination. It
has a limit of 15 hops.
Term Definition
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