Risc; Secure Shell (Ssh); Server Farm; Shadow Password - Cyclades AlterPath ACS Command Reference Manual

RISC

Reduced Instruction Set Computer. This describes a computer processor architecture
that uses a reduced set of instructions (and achieves performance by executing those
instructions very fast.) Most UNIX servers (Sun Sparc, HP, IBM RS6000, Compaq
Alpha) were designed with a processor using a RISC architecture. The Intel ® x86
architecture.
RS-232
A set of standards for serial communication between electronic equipment defined by
the Electronic Industries Association in 1969. Today, RS-232 is still widely used for
low-speed data communication.

Secure Shell (SSH)

SSH has the same functionality as Telnet (see definition below), but adds security by
encrypting data before sending it through the network.

Server Farm

A collection of servers running in the same location (see Cluster).

Shadow Password

Normally, each user's password is stored, encrypted, in the file /etc/passwd. This file
must be readable by all users so that certain system functions will operate correctly. This
means that copies of user's encrypted passwords are easily obtained, making it possible
to run an automated password-guessing program against them. Shadow passwords, on
the other hand, store the encrypted passwords in a separate highly-protected file, making
it much more difficult to crack passwords.

SNMP

Short for Simple Network Management Protocol, a set of protocols for managing
complex networks. The first versions of SNMP were developed in the early 80s. SNMP
works by sending messages, called protocol data units (PDUs), to different parts of a
network. SNMP-compliant devices, called agents, store data about themselves in
Management Information Bases (MIBs) and return this data to the SNMP requesters.
(Source: Webopedia)
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