8
Glossary
24-Port 10/100 + 4-Port Ggabt Swtch wth WebVew and Power over Ethernet
Appendx B
MAC (Meda Access Control) Address -
The unique
address that a manufacturer assigns to each networking
device .
Mask -
A filter that includes or excludes certain values, for
example parts of an IP address .
Mbps (MegaBts Per Second) -
One million bits per
second; a unit of measurement for data transmission .
MD (Message Dgest ) -
An algorithm that produces a
128-bit hash . MD5 is a variation of MD4, and increases MD4
security . MD5 verifies the integrity of the communication
and authenticates the origin of the communication .
MDI (Meda Dependent Interface) A cable used for end
statons.
MDIX (Meda Dependent Interface wth Crossover) -
A
cable used for hubs and switches .
MIB (Management Informaton Base) -
MIBs contain
information describing specific aspects of network
components .
Multcast -
Transmits copies of a single packet to multiple
ports .
Network -
A series of computers or devices connected for
the purpose of data sharing, storage, and/or transmission
between users .
NMS (Network Management System) -
An interface that
provides a method of managing a system .
OID (Object Identfer) -
Used by SNMP to identify
managed objects . In the SNMP Manager/Agent network
management paradigm, each managed object must have
an OID to identify it .
Packet -
A unit of data sent over a network .
Png (Packet INternet Groper) -
An Internet utility used
to determine whether a particular IP address is online .
Polcng -
Determines if traffic levels are within a specified
profile . Policing manages the maximum traffic rate used
to send or receive packets on an interface .
Port -
The connection point on a computer or networking
device used for plugging in cables or adapters .
Port Mrrorng -
Monitors and mirrors network traffic
by forwarding copies of incoming and outgoing packets
from one port to a monitoring port .
Power over Ethernet (PoE) -
A technology enabling an
Ethernet network cable to deliver both data and power .
QoS (Qualty of Servce) -
Provides policies that contain
sets of filters (rules) . QoS allows network managers
to decide how and what network traffic is forwarded
according to priorities, application types, and source and
destination addresses .
RADIUS (Remote Authentcaton Dal-
In User Service)
- A protocol that uses an authentication server to control
network access .
RJ-
45 (Registered Jack-45) - An Ethernet connector that
holds up to eight wires .
RMON (Remote Montorng) -
Provides network
information to be collected from a single workstation .
Router -
A networking device that connects multiple
networks together .
RSTP (Rapd Spannng Tree Protocol) -
Detects and uses
network topologies that allow a faster convergence of the
spanning tree, without creating forwarding loops .
Server -
Any computer whose function in a network is
to provide user access to files, printing, communications,
and other services .
SMTP (Smple Mal Transfer Protocol) -
The standard e-
mail protocol on the Internet .
SNMP (Smple Network Management Protocol) -
A
widely used network monitoring and control protocol .
SSH -
Secure Shell . A utility that uses strong authentication
and secure communications to log in to another computer
over a network .
SSL (Secure Socket Layer) -
Encryption technology for
the Internet used to provide secure transactions, such as
the transmission of credit card numbers for e-commerce .
Statc IP Address -
A fixed address assigned to a computer
or device that is connected to a network .
STP (Spannng Tree Protocol) -
Prevents loops in network
traffic . The Spanning Tree Protocol (STP) provides tree
topography for any arrangement of bridges . STP provides
one path between end stations on a network, eliminating
loops .
Subnet (Sub-
network) - Subnets are portions of a
network that share a common address component . In
TCP/IP networks, devices that share a prefix are part of
the same subnet . For example, all devices with a prefix of
157 .100 .100 .100 are part of the same subnet .
Subnet Mask -
An address code that determines the size
of the network .
Swtch -
Filters and forwards packets between LAN
segments . Switches support any packet protocol type .
(Termnal Access Controller Access Control
System Plus) -
Proprietary Cisco enhancement to
Terminal Access Controller Access Control System
(TACACS) . Provides additional support for authentication,
authorization, and accounting .
