| slovo | definícia |
x.21
(foldoc) | X.21
A digital signaling interface
recommended by ITU-T that includes specifications for
DTE/DCE physical interface elements, alignment of {call
control} characters and error checking, elements of the call
control phase for circuit switched services, data transfer
at up to 2 Mbps, and test loops. 64 kbps is the most
commonly used transfer rate.
(2000-02-28)
|
| | podobné slovo | definícia |
x.214
(foldoc) | transport layer
host-host layer
ISO 8072
ISO 8073
layer 4
X.214
X.224
(Or "host-host layer") The middle layer in the
OSI seven layer model. The transport layer determines how
to use the network layer to provide a virtual error-free,
point to point connection so that host A can send messages to
host B and they will arrive un-corrupted and in the correct
order. It establishes and dissolves connections between
hosts. It is used by the session layer.
An example transport layer protocol is {Transmission Control
Protocol} (TCP).
OSI documents: ITU Rec. X.214 (ISO 8072), ITU Rec. X.224
(ISO 8073).
(1997-12-07)
|
x.215
(foldoc) | session layer
ISO 8326
ISO 8327
layer 5
X.215
X.225
The third highest protocol layer (layer 5) in the
OSI
seven layer model. The session layer uses the {transport
layer} to establish a connection between processes on
different hosts. It handles security and creation of the
session. It is used by the presentation layer.
Documents: ITU Rec. X.225 (ISO 8327), ITU Rec. X.215 (ISO
8326).
[Examples?]
(1997-12-07)
|
x.216
(foldoc) | presentation layer
ISO 8822
ISO 8823
layer 6
X.216
X.226
The second highest layer (layer 6) in the OSI
seven layer model. Performs functions such as text
compression, code or format conversion to try to smooth out
differences between hosts. Allows incompatible processes in
the application layer to communicate via the {session
layer}.
Documents: ITU Rec. X.226 (ISO 8823), ITU Rec. X.216 (ISO
8822).
(1996-07-20)
|
x.217
(foldoc) | Association Control Service Element
ACSE
ISO 8649
ISO 8650
X.217
X.227
(ACSE) The OSI method for establishing a call
between two application programs. ACSE checks the
identities and contexts of the application entities, and could
apply an authentication security check.
Documents: ITU Rec. X.227 (ISO 8650), X.217 (ISO 8649)
(1997-12-07)
|
x.219
(foldoc) | Remote Operations Service Element
ISO 9072
ROSE
X.219
X.229
(ROSE) A sub-layer of protocol layer six
(presentation layer) in the OSI seven layer model which
provides SASE for remote operations.
Documents: ITU Rec. X.229 (ISO 9072-2), ITU Rec. X.219
(ISO 9072-1).
(1997-12-07)
|
|