Netgear GSM7224 사용자 설명서

Glossary

C-13

Nanometer (1 x 10e

9

) meters.

Resource-intensive OSPF area that carries a default route, static routes, intra-area routes, interarea routes, 
and external routes. Non-stub areas are the only OSPF areas that can have virtual links configured across 
them, and are the only areas that can contain an ASBR. Compare with stub area. See also ASAM and OSPF. 
(Cisco Systems Inc.) 

OSI is a seven (7) layer architecture model for communications systems developed by the ISO for the 
interconnection of data communications systems. Each layer uses and builds on the services provided by 
those below it. 

A block of information sent over a network. A packet typically contains a source and destination network 
address, some protocol and length information, a block of data, and a checksum.

The OSI Physical Layer: The physical layer provides for transmission of cells over a physical medium 
connecting two ATM devices. This physical layer is comprised of two sublayers: the Physical Medium 
Dependent (PMD) sublayer, and the Transmission Convergence (TC) sublayer. 

PPP. A protocol allowing a computer using TCP/IP to connect directly to the Internet.

Also known as a roving analysis port. This is a method of monitoring network traffic that forwards a copy of 
each incoming and outgoing packet from one port of a network switch to another port where the packet can 
be studied. A network administrator uses port mirroring as a diagnostic tool or debugging feature, especially