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Glossary
Management-only clustering.
A Traffic Server option where all nodes in a cluster automatically share
configuration information. See also Chapter , “Full clustering,”.
Messages.
The LINUX system logging facility.
MIB.
Management Information Base. The set of parameters that an SNMP management station can query in
the SNMP agent of a network device (for example, a router). Traffic Server supports two MIBs: MIB2 (a well-
known standard MIB) and the HP proprietary Traffic Server MIB, which provides more specific node and
cluster information.
Monitor mode.
One of two modes in Chapter , “Traffic Manager,” and Chapter , “Traffic Line,”. Monitor
mode lets you view statistics about Traffic Server performance and web traffic. See also Chapter , “Configure
mode,”.
MRTG.
Multi Router Traffic Grapher. A graphing tool provided with Traffic Server that enables you to
monitor Traffic Server’s performance.
Netscape log format.
A standard access log format. Using the Netscape log format, you can analyze Traffic
Server access log files with off-the-shelf log analysis scripts. See also Chapter , “Squid log format,”.
News server.
A web server you can access to read and post to usenet newsgroups.
NNTP.
Network News Transfer Protocol. A protocol used to distribute, inquire, retrieve, and post news
articles.
Object store.
A custom high-speed database where Traffic Server stores all cached objects.
Origin server.
The web server that contains the original copy of the requested information.
Parent cache.
A cache higher up in a Chapter , “Cache hierarchy,”, to which Traffic Server can send requests.
Plugin.
An add-on feature that provides additional functionality to Traffic Server, such as origin server
blacklisting, web content filtering, authentication, and data transformation.
POP.
1. Point of Presence. Usually a city or location to which a network can be connected, often with dial up phone
lines.
2. 2. Post Office Protocol. The basic protocols for addressing e-mail.
Proxy server.
See Chapter , “Web proxy server,”.
Reverse proxy.
A option that allows Traffic Server to be configured as an origin server for convenient
geographical distribution of server content. Reverse proxy also offloads static content service from servers
building dynamic content and provides a peak load buffer or surge protector for origin servers.
Sometimes referred to as Chapter , “Server acceleration,”.
Router.
A device that handles the connection between two or more networks. Routers look at destination
addresses of the packets passing through them and decide which route to send them on.
Server acceleration.
See Chapter , “Reverse proxy,”.
SNMP.
Simple Network Management Protocol. A set of standards used for communication with devices
connected to a TCP/IP network. SNMP-compliant devices (agents) store information about themselves in
Chapter , “MIB,”s and provide this information to SNMP Managers.
SOCKS.
A circuit-level proxy protocol that provides a tunneling mechanism for protocols that cannot be
proxied conveniently.
Squid log format.
A standard access log format. Using the Squid log format, you can analyze Traffic Server
event log files with off-the-shelf log analysis scripts. See also Chapter , “Netscape log format,”.
SSL.
Secure Sockets Layer. A protocol that enables encrypted, authenticated communications across the
Internet. Used mostly in communications between origin servers and web browsers.
TCP.
Transmission Control Protocol. An Internet Standard transport layer protocol. TCP provides reliable
end-to-end communication by using sequenced data sent by IP.
traffic_cop.
A Traffic Server process that periodically monitors the health of the Chapter , “traffic_server,”
and Chapter , “traffic_manager,” processes by issuing heartbeat requests to fetch synthetic web pages.
Traffic Line.
Traffic Server’s command-line utility that enables you to monitor performance and change
configuration settings.
