HP J3278B - SureStore CD-ROM Server/Tower 7 NAS Server User Manual page 87

N
Network File System (NFS)
An network protocol designed by Sun Microsystems that allows all network users to access
shared files stored on computers of different types. Users can manipulate shared files as if
they were stored locally on the user's own hard disk.
With NFS, computers connected to a network operate as clients while accessing remote files,
and as servers while providing remote users access to local shared files. The NFS standards
are publicly available and widely used.
Network Interface Card (NIC)
An expansion card or other device used to connect a computer to a local area network.
P
Packet
A block of information sent across a network. Packets contain header (which handle
addressing), error correction, checksums, and data.
Permission
The ability of a particular user in a multi-user computer environment to access a particular
resource by means of a user account. Permissions are stored in the system, in a file called a
permissions log. Permissions are checked when a user attempts to access a resource.
Permission bits
Bits that identify the read/write/execute (rwx) privileges for a UNIX file's owner, group, and
anyone else that needs access to the file (other).
Physical drive
A term for the hard drives installed in the HP NAS VA.
Primary Domain Controller (PDC)
A server that has been assigned to become the primary authentication server for the Windows
NT domain. It stores a copy of the Security Accounts Manager (SAM) database and uses this
database to authenticate users.
R
Redundant Array of Independent Disks (RAID)
RAID is a method of combining several disk drives into a single logical storage unit. RAID
offers the advantage of fault tolerance by providing real-time data recovery when a disk drive
fails, increasing system uptime and network availability. RAID also increases system
performance when multiple drives work together.
Remote event log
A file located on a UNIX machine containing statistics and error messages.
87