HP Compaq t1000 - Page 264

Glossary 234
RAM Random-Access Memory. A mass store that provides fast
access to any stora
g
e location by means of vertical and
horizontal coordinates. Information is written in or read out usin
g
the same procedure. The memory cycle time is the same for any
location addressed because there is no waitin
g
or sortin
g
time
required, as there is when data items are stored sequentially.
RAS 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 lo
g
on, and then presents the
same network interface as the normal network drivers (albeit
sli
g
htly slower).
RDP Remote Desktop Protocol. A presentation service protocol that
g
overns input and output between a WBT and WTS (Windows
Terminal Server). It is based on the T.share protocol.
RS-232 cable A cable for serial interfaces between the terminal and
communications devices, such as a modem. The cable
connects to the 9-pin serial port at the back of the terminal.
Maximum cable len
g
th is 50 feet; maximum si
g
nalin
g
rate is 20
Kbits/sec.
RTS/CTS flow control Request to Send/Clear to Send flow control. Enables flow
control on the local serial line. RTS is the output of the terminal;
CTS is the input to the terminal.
Serial port A connector on a computer to which you can attach a serial line
connected to peripherals that communicate usin
g
a serial
(bit-stream) protocol. The most common type of serial port is a
25-pin D-type connector carryin
g
RS-232 si
g
nals. Smaller
connectors (e.
g
. 9-pin D-type) carryin
g
a subset of RS-232 are
often used on personal computers.
Server The control computer on a local area network that controls
software access to workstations, printers, and other parts of the
network.
SNMP Simple Network Mana
g
ement Protocol. The industry standard
protocol for mana
g
in
g
TCP/IP networks. This protocol queries
a
g
ents in mana
g
ed devices and passes information to the
mana
g
ement console.
Start bit In asynchronous transmission, the first bit of any
g
iven
character used to alert the receivin
g
system to reco
g
nize the
related incomin
g
data.