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Appendix D: Glossary
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
QoS (Quality of Service) -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 Authentication Dial-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 Monitoring) - Provides network information to be collected from a single workstation.
Router - A networking device that connects multiple networks together.
RSTP (Rapid Spanning 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 (Simple Mail Transfer Protocol) - The standard e-mail protocol on the Internet.
SNMP (Simple 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.
Static IP Address - A fixed address assigned to a computer or device that is connected to a network.
STP (Spanning 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.
Switch - Filters and forwards packets between LAN segments. Switches support any packet protocol type.
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