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Glossary
Glossary-24 PortMaster Configuration Guide
NIC
Network interface card. A card that provides network communication capabilities to and
from a computer system. A NIC is also known as an
adapter
.
NIS
Network Information Service. A protocol developed by Sun Microsystems for the
administration of network-wide databases.
NLRI
Network layer reachability information. The part of a BGP route containing the IP address
prefixes and associated netmask lengths that are reachable via the path described in the
route. The networks indicated by these prefixes and netmasks reside in the destination
autonomous system—the final one listed in the path.
node
A device, such as a PC, server, switching point, bridge, or gateway, connected to a
network at a single location. A node can also be called a
station
. See host.
nonvolatile RAM
See NVRAM.
notification message
A message sent between BGP peers to inform the receiving peer that the sending peer
must terminate the BGP session because an error occurred. The message contains
information that explains the error. See also keepalive message; open message;
update message.
not-so-stubby-area
See NSSA.
NSSA
Not-so-stubby-area. In OSPF, an area similar to a stub area except that Type 1 and Type 2
external routes can be learned from it. Any external routes learned from an NSSA are
translated into Type 1 and Type 2 external routes for the backbone area or other areas
that accept external routes. Like stub areas, NSSAs can have default costs set for them but
cannot have external routes advertised into them.