Cabletron Systems CSX200 CyberSWITCH Installation Manual page 84

Appendix D: Glossary
Open System Interconnection. An international standard developed by ITU (formally
OSI —
CCITT) and ISO (International Organization for Standardization) to facilitate data networking
multi-vendor interoperability. The OSI Reference Model defines seven layers, each providing
specific network functions.
Packet — A group of data that includes a header and usually user data for transmission through a
network.
Ping (Packet Internet Groper) —
sent to a remote node and returned; used to test the accessibility of the remote node.
PPP (Point-to-Point Protocol) —
synchronous connectivity between computer/network nodes. Includes standardization for security
and compression negotiation.
Q.921 — ISDN Data Link layer specification for the user-to-network interface.
ISDN specification for call set-up and signaling on ISDN connections.
Q.931 —
Request for Comment. Documentation describing Internet communications
RFC —
specifications (e.g., Telnet, TFTP). Often these RFCs are used to achieve multi-vendor
interoperability during implementation.
Standard 4-wire connectors for telephone lines.
RJ11 —
RJ45 — Standard 8-wire connectors used for ISDN lines and 10 BASE-T connections.
RIP (Routing Information Protocol) —
information between routers to keep routing tables current.
A Network layer function that determines the path for transmitting packets through a
Routing —
network from source to destination.
RS-232 — EIA standard specifying the physical layer interface used to connect a device to
communications media.
Serialization Frames —
NetWare are in use on the network.
Service Advertising Protocol —
services available on the network, such as file servers, CD-ROM drives and modem pools.
D-4
An echo message, available within the TCP/IP protocol suite,
A Data Link layer protocol that provides asynchronous and
Protocols used in IP and IPX for broadcasting open path
Frames sent out by servers under IPX to check whether illegal copies of
Protocol used in IPX for broadcasting information about
CSX200 Installation Guide