Nomadix Universal subscriber gateway User Manual page 244

Protocol
A standard process consisting of a set of rules and conditions that regulates data transmissions between
computing devices. Some examples of protocols include HTTP (HyperText Transfer Protocol), FTP (File
Transfer Protocol), TCP/IP (Transmission Control Protocol/Internet Protocol), and POP (Post Office
Protocol). All these protocols are responsible for regulating the transmission of their specific data file
types.
QoS
(Quality of Service) A collective measure of the level of service delivered to the customer. QoS can be
characterized by several basic performance criteria, including availability (low downtime), error
performance, response time and throughput, lost calls or transmissions due to network congestion,
connection set-up time, and the speed of fault detection and correction. Service providers may guarantee a
particular level of QoS (defined by a service level agreement) to their subscribers. QoS-enabled hardware
and software solutions sort and classify IP packet requests into different traffic classes and allocate the
proper resources to direct traffic based on various criteria, including application type, user or application
ID, source or destination IP address, time of day, and other user-specified variables. See also,
RADIUS
(Remote Authentication Dial-In User Service) An authentication and accounting system used by many
Internet Service Providers (ISPs). When you dial in to the ISP you must enter your user name and
password. This information is passed to a RADIUS server, which checks that the information is correct,
and then authorizes access to the ISP system.
RFC
(Request for Comments) A series of notes about the Internet, started in 1969 (when the Internet was the
ARPANET). An RFC note can be submitted by anyone. Each RFC is designated by an RFC number. Once
published, an RFC never changes. Any modifications to an original RFC are assigned a new RFC number.
RIPv2
(Routing Information Protocol, version 2) A protocol defined by Request For Comments (RFC) 1058 that
specifies how routers exchange routing table information. With RIP, routers periodically exchange entire
tables. Because this approach can be inefficient, RIP is gradually being replaced by a newer routing
protocol called Open Shortest Path First (OSPF). See also,
Round Robin Queuing
An algorithm that services each queue in a predefined sequence. For example, it might empty 1,500 bytes
apiece from queue 1 (high priority), queue 2 (medium priority), and queue 3 (low priority), servicing each
in turn.
Router
A hardware device that connects two or more networks and routes the incoming data packets to the
appropriate network.
SLIP
(Serial Line Internet Protocol) SLIP is a standard protocol for connecting to the Internet with a modem over
a phone line. It has trouble with noisy dial-up lines and other error-prone connections, so look to higher-
level protocols like PPP for error correction.
SMTP
(Simple Mail Transfer Protocol) A standard protocol that regulates how e-mail is distributed over the
Internet. See also, Protocol.
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U S
NIVERSAL UBSCRIBER
OSPF and Router.
Glossary of Terms
G ™
ATEWAY
CoS and ToS.