Netgear 7300S User Manual download pdf (Page 395)

User Manual for the NETGEAR 7300S Series Layer 3 Managed Switch Software

Glossary C-15

202-10088-01, March 2005

protocol. This protocol's algorithm determines the shortest path from its router to all the other routers in the

network. This protocol is rapidly replacing RIP on the Internet.

Open Systems Interconnection

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.

OSI

See “Open Systems Interconnection” on page 15.

OSPF

See “Open Shortest Path First” on page 14.

packet

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.

PDU

See “Protocol Data Unit” on page 16.

PHY

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.

PIM-DM

See “Protocol Independent Multicast – Dense Mode” on page 16.

PMC

Packet Mode Channel.

Point-to-Point Protocol

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

Port Mirroring

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

when fending off an attack. It enables the administrator to keep close track of switch performance and alter it

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Netgear 7300S User Manual Page 395