Specifications

Glossary
208 Equalizer Installation and Administration Guide
switch A device, which is attached to a network and which controls the route over
which data is sent.
SYN/ACK Synchronize and acknowledge; a message that synchronizes a sequence of
data information and acknowledges the reception of that information.
syslog A system log file, in which information, warning, and error messages are stored
in a file, sent to a system, or printed.
TCP Transmission Control Protocol; the rules for the conversion of data messages
into packets. See ISO/OSI model, Layer 4, packet, transport layer, and TCP/IP.
TCP/IP Transmission Control Protocol/Internet Protocol; the rules for transmitting data
over networks and the Internet. See TCP.
Telnet Part of TCP/IP, a protocol that enables a user to log onto a remote computer
connected to the Internet. See TCP/IP.
traceroute A utility that shows the route over which a packet travels to reach its
destination.
Transmission Control Protocol
(TCP)
See TCP.
Transmission Control
Protocol/Internet Protocol
(TCP/IP)
See TCP/IP.
transport layer See Layer 4. See also ISO/OSI model.
TTL Time-to-live, the length of time, in seconds, that a client’s DNS server should
cache a resolved IP address.
User Datagram Protocol (UDP) Within TCP/IP, a protocol that is similar to Layer 4 (the transport layer). UDP
converts data into packets to be sent from one server to another but does not
verify the validity of the data. See ISO/OSI, TCP/IP, and transport layer.
view mode One of two modes in which Equalizer can be administered: edit and view. In
view mode, you can view
—but not edit—parameters. See edit mode.
virtual cluster An endpoint that acts as the network-visible port for a set of hidden back-end
servers. See cluster, endpoint, FTP cluster, geographic cluster, and server
cluster.
virtual server address An IP address that is aliased to a physical server that has its own, separate IP
address. See virtual web server.
virtual web server Software that imitates HTTP server hardware. A virtual web server has its own
domain name and IP address. See domain name, HTTP, IP address, server,
and virtual server address. See also authoritative name server, back-end
server, name server, physical server, and proxy server.
WAP See Wireless Application Protocol.
weight The relative proportion of a single item in a population of similar items. See
dynamic weight, server weight, and static weight.
Wireless Application Protocol
(WAP)
A set of rules that govern access to the Internet through wireless devices such
as cellular telephones, pagers, and two-way communication devices.