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SonicOS 5.8.1 Administrator Guide
Glossary
Application layer: The seventh level of the 7-layer OSI model; examples of application layer
protocols are AIM, DNS, FTP, HTTP, IMAP, MSN Messenger, POP3, SMTP, SNMP, TELNET,
and Yahoo Messenger
Bandwidth management: The process of measuring and controlling the traffic on a network
link to avoid network congestion and poor performance of the network
Client: Typically, the client (in a client-server architecture) is an application that runs on a
personal computer or workstation, and relies on a server to perform some operations
Digital rights management: Technology used by publishers or copyright owners to control
access to and usage of digital data
FTP: File Transfer Protocol, a protocol for exchanging files over the Internet
Gateway: A computer that serves as an entry point for a network; often acts as a firewall or a
proxy server
Granular control: The ability to control separate components of a system
Hexadecimal: Refers to the base-16 number system
HTTP: Hyper Text Transfer Protocol, the underlying protocol used by the World Wide Web
HTTP redirection: Also known as URL redirection, a technique on the Web for making a Web
page available under many URLs
IPS: Intrusion Prevention Service
MIME: Multipurpose Internet Mail Extensions, a specification for formatting non-ASCII
messages such as graphics, audio, or video, so that they can be sent over the Internet
POP3: Post Office Protocol, a protocol used to retrieve email from a mail server; can be used
with or without SMTP
Proxy: A computer that operates a network service that allows clients to make indirect network
connections to other network services
SMTP: Simple Mail Transfer Protocol, a protocol used for sending email messages between
servers
UDP: User Datagram Protocol, a connectionless protocol that runs on top of IP networks