April 14, 2006 | Glossary |
Q
QoS – Quality of Service is the configured traffic parameters that are assigned to a virtual circuit, which specifies how quickly and how accurately data is transferred from the sender to the receiver.
R
RFC – Request For Comment is a series of notes that contain surveys, measurements, ideas, techniques, and observations, as well as proposed and accepted TCP/IP protocol standards. RFCs are available on the Internet.
RIP – Routing Information Protocol allows routers to update the routing tables automatically (for example with information such as how many hops between destinations). The version of RIP you select for the session must match the version supported by the service provider. Versions RIP1 and
S
SEF – Severely Errored Frames is the incoming signal has at least four consecutive errored framing patterns.
SES – Severely Errored Seconds is the seconds during which more than 2,500 bipolar errors are detected on the line.
session – The time during which two computers maintain a communication connection. An example is a connection configured between the Megabit Modem and the service provider.
SNMP – Simple Network Management Protocol is a protocol that specifies how to send information between a NMS and managed devices on a network. The managed devices run a program called an agent. The agent interprets SNMP request and responds to them. SNMP is used to set device configurations, read device configurations or read the device status.
Spanning Tree – A bridging protocol that detects and prevents loops from occurring in a system containing multiple bridges.
subnet mask – A type of IP address that allows a site to use a single IP address for multiple physical networks.
T
TCP – Transmission Control Protocol is a transport protocol used to map inbound traffic (from a remote IP address) to an internal (LAN) IP address. Establishes connection with remote user before data transmission.
TCP/IP – Transmission Control Protocol/Internet Protocol is a protocol used for communications between computers over networks and the internet.
TFTP – Trivial File Transfer Protocol is a protocol used to download card images or other files from an external TFTP server to the NVRAM of any installed cards, or to upload files from an installed card to an external TFTP server.
trap receivers – PCs configured to receive SNMP traps (messages).
traps – Autonomous,
U
UAS – UnAvailable Seconds is the number of seconds during which the line is unavailable.
UBR – Unspecified Bit Rate is an ATM traffic type used for LAN traffic. When network congestion occurs, the data is stored in a buffer until it can be sent.
UDP – User Datagram Protocol is a transport protocol used to map inbound traffic (from a remote IP address) to an internal (LAN) IP address. Uses a protocol port number for the destination at the remote location.
upstream trafficCommunications from a user to a service provider.
V
VCI – Virtual Channel Identifier is a
VCMUX – Virtual Channel
VCA – Virtual Channel is a logical connection in the ATM network over which ATM cells are transmitted.
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