SCTP Administrator's Guide
SACK This chunk is sent to the peer endpoint to acknowledge the received DATA chunks and to inform
the peer endpoint of gaps in the received subsequences of DATA chunks as represented by their
Transmission Sequence Numbers.
SCTP packet The unit of data delivery across the interface between SCTP and the connectionless packet network
(for example, IP). An SCTP packet contains the common SCTP header, possible SCTP control
chunks, and user data encapsulated within SCTP DATA chunks.
SHUTDOWN An endpoint in an association must use this chunk to initiate a graceful termination of the
association with its peer.
Silly Window
Syndrome
Silly Window Syndrome is a condition when only small amounts of data are exchanged across
the connection, instead of full-sized segments
Stream A uni-directional logical channel established from one to another associated SCTP endpoint,
within which all user messages are delivered in sequence except for those submitted to the
unordered delivery service.
Supported
Address
Types
The sender of INIT must include a Supported Address Types parameter in theINIT to indicate the
types of address that are acceptable. When this parameter is present, the receiver ofINIT must
either use one of the address types indicated in the Supported Address Types parameter when
responding to the INIT, or abort the association with an "Unresolvable Address" error.
Verification
Tags
A 32-bit unsigned integer that is randomly generated. The verification tag provides a key that
allows a receiver to verify that the SCTP packet belongs to the current association and is not an
old or stale packet from a previous association.
42 Glossary