Xpeed 320R, Руководство пользователя

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Glossary
102 Xpeed Networks, Inc.
NAT (Network Address Translation) - The translation of an Internet Protocol
address (IP address) used within one network to a different IP address known
within another network. One network is designated the inside network and the
other is the outside. Typically, a company maps its local inside network addresses
to one or more global outside IP addresses and unmaps the global IP addresses on
incoming packets back into local IP addresses. This helps ensure security since
each outgoing or incoming request must go through a translation process that also
offers the opportunity to qualify or authenticate the request or match it to a previ-
ous request. NAT also conserves on the number of global IP addresses that a com-
pany needs and it lets the company use a single IP address in its communication
with the world.
Network Protocol - The network protocol defines the rules and parameters for
network communications.
NIC (Network Interface Card) - Circuit board, usually installed in a personal
computer, that provides the physical interface to a communications network. Also
called an adapter card.
NT (Network Termination) - Refers to the mode of an equipment that exists on the
user’s line, terminating the connection from the network. See also LT
Packet - A piece of information formatted for transmission over a network from
one device to another. Data is broken up into packets for sending over a network,
and each packet has a header containing source and destination addresses, an
identification number, and error-checking code.
PAP (Password Authentication Protocol) - A security protocol that establishes a
two-way handshake to verify the identity of the two computers.
PPP (Point-to-Point Protocol) - A method of connecting a computer to the Inter-
net.
Protocol - A set of rules or standards that regulate data exchange between com-
puters, including the rules for data transmission and the formatting of messages.
PVC (Permanent Virtual Circuit) - A term found in frame relay networking in
which a virtual connection between two fixed end-points is established through
the network.
RFC (Request for Comment) - A term for an IETF specification.
RIP (Routing Information Protocol) - A distance vector routing protocol popular
for routing IP.