User manual

Glossary
58
Share
A share is a shared directory thatÕs accessible via the network.
Each share on the NASRaQ is simultaneously accessible to both
Windows and Macintosh clients if enabled. Each share can have a
unique set of access controls.
SMB
The Server Message Block (SMB) protocol enables client
applications in a computer to read and write to Þles on a
computer network and to request services from server programs
in a computer network for systems running Windows.
Striping
RAID level 0, often time called ÒstripingÓ, is a performance-
oriented striped data mapping technique. That means the data
being written to the array is broken down into strips and striped
across the member disks of the array. This provides high I/O
performance at low inherent cost but provides no
redundancy.
Subnet mask (netmask)
A number that, in conjunction with an IP address, deÞnes the set
of IP addresses that are considered Òlocal.Ó For example, if your
IP address is 192.168.25.77 and your subnet mask is 255.255.255.0,
then addresses between 192.168.25.1 and 192.168.25.255 are
considered local.
Swap Þle
A space on a hard disk used as the virtual memory extension of a
computer's real memory (RAM). Having a swap Þle allows your
computer's operating system to pretend that you have more
RAM than you actually do. The least-recently-used Þles in RAM
can be Òswapped outÓ to your hard disk until they are needed
later so that new program segments or data can be Òswapped inÓ
to RAM.
TCP/IP
The Transmission Control Protocol/Internet Protocol (TCP/IP) is
software that enables computers and networks to connect to an
intranet or Internet.
Virtual (or logical) memory
A concept that allows programmers to use a large range of
memory or storage addresses, more than physically exists on the
system, for stored data.