Wyse Winterm 3000 Series User Manual page 76

Glossary 4
Packet
PAP
Parallel port
Parity check
PCMCIA
Ping
PPP
Protocol
RAM
RAS
RDP
A group of bits (including data and call control signals) transmitted as an
identifiable unit on a packet-switched network (PSN).
Password Authentication Protocol. An authentication scheme used by PPP
servers to validate the identity of the originator of the connection. PAP
applies a two-way handshaking procedure. After the link is established the
originator sends an id-password pair to the server. If authentication
succeeds the server sends back an acknowledgment; otherwise it either
terminates the connection or gives the originator another chance.
An input/output port that allows the entire bit pattern for a single character to
be sent at one time, usually used to connect a printer to a computer.
The addition of non-information bits (specifically, parity bits) to make up a
transmission block (a number of bits transmitted as unit) that ensures the
total number of ones is always either even (even parity) or odd (odd parity).
The parity check is used to detect transmission errors.
Personal Computer Miniature Connector Interface Adapter. Hardware and
software standards for credit-card-sized integrated circuit cards.
Packet InterNet Groper. A protocol used in the Transmission Control
Protocol (TCP) environment to test whether a node or remote device is
communicating on a local area network (LAN) or wide area network (WAN).
The protocol provides for transporting an echo response from a host system,
a client, or a gateway. It is a useful tool for locating problems on the network
related to failed connections and software problems. One datagram is sent
every second over the network and any response is displayed.
Point-to-Point Protocol. A serial communication protocol that operates over
dialup or leased (dedicated) lines to provide connections into IP networks. It
sets up and monitors router sessions and frames the data transmitted over
the line.
A set of formal rules describing how to transmit data, especially across a
network. Low-level protocols define the electrical and physical standards to
be observed, bit- and byte-ordering, and the transmission and error
detection and correction of the bit stream. High level protocols deal with the
data formatting, including the syntax of messages, the terminal to computer
dialogue, character sets, sequencing of messages, etc.
Random-Access Memory. A mass store that provides fast access to any
storage location by means of vertical and horizontal coordinates. Information
is written in or read out using the same procedure. The memory cycle time is
the same for any location addressed because there is no waiting or sorting
time required, as there is when data items are stored sequentially.
Remote Access Services. A service provided by Windows NT that allows
most of the services which would be available on a network to be accessed
over a modem link. The service includes support for dialup and logon, and
then presents the same network interface as the normal network drivers
(albeit slightly slower). It is not necessary to run Windows NT on the client -
there are client versions for other Windows operating systems.
Remote Desktop Protocol. A computing technology that separates an
application's logic from its user interface and allows 100% application
execution on the server.