Fore Systems forerunner series, Configuration Manual

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ForeRunner ATM Switch Network Configuration Manual
Glossary - 29
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Glossary
Request To Send (RTS) -
an RS-232 modem interface signal (sent from the DTE to the modem
on pin 4) which indicates that the DTE has data to transmit.
Requests For Comment (RFCs) -
IETF documents suggesting protocols and policies of the
Internet, inviting comments as to the quality and validity of those policies. These comments
are collected and analyzed by the IETF in order to finalize Internet standards.
RFC1483 -
Multiprotocol Encapsulation over ATM Adaptation Layer 5.
RFC1490 -
Multiprotocol Interconnect over Frame Relay.
RFC1577 -
Classical IP and ARP over ATM.
RFC1755 -
ATM Signaling Support for IP over ATM.
Robbed-Bit Signaling -
In T1, refers to the use of the least significant bit of every word of
frames 6 and 12 (D4), or 6, 12, 18, and 24 (ESF) for signaling purposes.
Route Server -
A physical device that runs one or more network layer routing protocols, and
which uses a route query protocol in order to provide network layer routing forwarding
descriptions to clients.
Router -
a device that forwards traffic between networks or subnetworks based on network
layer information.
Routing Domain (RD) -
A group of topologically contiguous systems which are running one
instance of routing.
Routing Information Protocol (RIP) -
a distance vector-based protocol that provides a measure
of distance, or hops, from a transmitting workstation to a receiving workstation.
Routing Protocol -
A general term indicating a protocol run between routers and/or route
servers in order to exchange information used to allow computation of routes. The result of
the routing computation will be one or more forwarding descriptions.
SBus -
hardware interface for add-in boards in later-version Sun 3 workstations.
Scalable Processor Architecture Reduced instruction set Computer (SPARC) -
a powerful work-
station similar to a reduced-instruction-set-computing (RISC) workstation.
Segment -
a single ATM link or group of interconnected ATM links of an ATM connection.
Segmentation And Reassembly (SAR) -
the SAR accepts PDUs from the CS and divides them
into very small segments (44 bytes long). If the CS-PDU is less than 44 bytes, it is padded to 44
with zeroes. A two-byte header and trailer are added to this basic segment. The header identi-
fies the message type (beginning, end, continuation, or single) and contains sequence number-
ing and message identification. The trailer gives the SAR-PDU payload length, exclusive of
pad, and contains a CRC check to ensure the SAR-PDU integrity. The result is a 48-byte PDU
that fits into the payload field of an ATM cell.
Selector (SEL) -
A subfield carried in SETUP message part of ATM endpoint address Domain
specific Part (DSP) defined by ISO 10589, not used for ATM network routing, used by ATM
end systems only.