G L O S S A R Y Intel® NetStructure™ 7190 Multi-Site Traffic Director User Guide

Flash Response Mode

A solution to DNS site balancing based on network latency. Rather

 

than attempt to actual measure network latency to a client DNS

 

server, Flash DNS broadcasts separate responses simultaneously

 

from each of the balanced sites. The response from the site with the

 

least network latency to the client DNS server arrives first to be used.

 

All other responses are discarded by the client DNS server as part of

 

normal DNS protocol.

Flash Peer

Broadcaster of a Flash DNS answer.

Flash Source

A Flash Source is the Flash Peer that is responsible for referring VIPs

 

associated with an Agent or Pseudo-Agent when Flash DNS site

 

balancing is used. The Flash Source generally must be on the same

 

network as the Agent/Pseudo-Agent or at least behind the same

 

router. When Flash DNS support is enabled on a load balancer, both

 

the Flash Source and Agent have the same address (the online outside

 

IP address of the load balancer).

Global Sync

The process of automatically transferring (copying) the primary 7190

 

configuration to a secondary 7190.

HTTP

Hypertext Transfer Protocol: the protocol used between a web

 

browser and a server to request a document and transfer its contents.

HTTPS

HTTP exchanged over an SSL-encrypted session.

IP

Internet Protocol

IP Address

A unique identifier for a node on an IP network. Expressed in “dotted

 

decimal” notation. For example: 10.0.0.1.

IP Service

A network-accessible, IP-accessible Application Protocol. For

 

example: HTTP, FTP, and the like. For administration purposes of

 

the Intel Netstructure products, services are identified by Virtual

 

IP:Port.

ISV

Intelligent Site Verification. Intelligent Site Verification is used to

 

determine the availability of a third-party load balancer site. Methods

 

of verification include a site ping, TCP connect, and HTTP probe.

ITM (Internet Traffic

Intel® NetStructure™ 7140 and 7170 Traffic Director products, used

Manager)

for load balancing.

Least Connections

This algorithm sends requests to the site with the lowest number of

 

connections. Least connections offers more effective management

 

for long sessions, such as FTP.

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