Cyclades ACS48 Benutzerhandbuch

142

compares this value with the one sent with the data. If the two 
values are the same, the receiver has some confidence that the 
data was received correctly.

A cluster is a group of one or more computers working as a 

group to execute a certain task. From the user standpoint, a 
cluster acts as a large computer system.

A CAS has an Ethernet LAN connection and many RS-232

(CAS)

serial ports. It connects to the console ports of servers and 

networking equipment and allows convenient and secure 
access from a single location.

The community name acts as a password and is used to 

authenticate messages sent between an SNMP client and a 
router containing an SNMP server. The community name is 
sent in every packet between the client and the server. 

Terminal used to configure network devices at boot (start-up) 

time. Also used to refer to the keyboard, video and mouse 
user interface to a server.

Most of the equipment in a data center (servers, routers, 

switches, UPS, PBX, etc.) has a serial console port for out-of-
band management purposes.

Dynamic Host Configuration Protocol. A protocol for 

automatic TCP/IP configuration that provides static and 
dynamic address allocation and management. 

DHCP enables individual computers on an IP network to 

extract their configurations from a server (the 'DHCP server') 
or servers, in particular, servers that have no exact 
information about the individual computers until they request 
the information. The overall purpose of this is to reduce the 
work necessary to administer a large IP network. The most 
significant piece of information distributed in this manner is 
the IP address.