Cyclades ACS48 Benutzerhandbuch

141

Glossary

The process by which a user’s identity is checked within the 

network to ensure that the user has access to the requested 
resources.

Chips on the motherboard of a computer contain read only

(BIOS)

memory instructions that are used to start up a computer. The 

operating system of a PC also makes use of BIOS 
instructions and settings to access hardware components such 
as a disk drive. Some BIOS/CMOS settings can be set to scan 
for viruses, causing problems for some installation programs.

The baud rate is a measure of the number of symbols 

(characters) transmitted per unit of time. Each symbol will 
normally consist of a number of bits, so the baud rate will 
only be the same as the bit rate when there is one bit per 
symbol. The term originated as a measure for the 
transmission of telegraph characters. It has little application 
today except in terms of modem operation. It is 
recommended that all data rates are referred to in bps, rather 
than baud (which is easy to misunderstand). Additionally, 
baud rate cannot be equated to bandwidth unless the number 
of bits per symbol is known.

To start a computer so that it is ready to run programs for the 

user. A PC can be booted either by turning its power on, 
(Cold Boot) or by pressing Ctrl+Alt+Del (Warm Boot).

A break signal is generated in an RS-232 serial line by 

keeping the line in zero for longer than a character time. 
Breaks at a serial console port are interpreted by Sun servers 
as a signal to suspend operation and switch to monitor mode.

A computed value which depends on the contents of a block 

of data and which is transmitted or stored along with the data 
in order to detect corruption of the data. The receiving system 
recomputes the checksum based upon the received data and