| Appendix C: Glossary |
|
|
NVRAM | |
| information, so the information is not lost when the system is reset. |
octet | A TCP/IP term indicating eight bits. |
PDU | Protocol Data Unit is data as it appears at the interface between a particular sublayer |
| and the sublayer immediately below. |
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. |
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 connection must match the |
| version supported by the service provider. Versions RIP1 and |
| for broadcast. Version RIP 2 uses multicast. |
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. |
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. |
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. |
Megabit Modem 410F and 420F User Manual | 89 |