Specifications

7
Cisco 600 Series Installation and Operation Guide
78-11190-01
Glossary
N
NAT
Network Address Translation.
network layer
The OSI layer that is responsible for routing, switching, and subnetwork access
across the entire OSI environment.
node
A general term used to refer to a computer or related device; often used to refer
to a networked computer or device.
NVT
Network Virtual Terminal.
NVRAM
Non-Volatile Random Access Memory. The router uses this memory to store
configuration information. The contents of this memory are not lost after a reboot
or power cycle of the unit.
O
octet
A networking term that identifies 8 bits. In TCP/IP, it is used instead of
byte,
because some systems have bytes that are not 8 bits.
OSI
Open Systems Interconnection. An international standardization program to
facilitate communications among computers from different manufacturers. See
ISO.
P
packet
The unit of data sent across a packet switching network.
PAP
Password Authentication Protocol.
PCI
Peripheral Component Interconnect. An industry local bus standard. Supports up
to 16 physical slots but is electrically limited to typically three or four plug-in
PCI cards in a PC. Has a typical sustained burst transfer rate of 80 Mbps, which
is enough to handle 24-bit color at 30 frames per second (full-color, full-motion
video).