Glossary
cookie switching
Refers to three distinct ways to perform cookie switching: cookie-read, cookie-insert, and cookie-rewrite.
D
daemon
An application that runs in the background and performs one or more actions when events trigger those actions.
default gateway
A default gateway is on the same subnet as Equalizer, and is the gateway which Equalier relies on to route traffic.
delay weight
The relative influence on the policy of the current response time between Equalizer and the server.
Direct Server Return (DSR)
In a Direct Server Return (DSR) configuration, the server receiving a client request responds directly to the client IP, bypassing
Equalizer. Because Equalizer only processes incoming requests, cluster performance is dramatically improved when using DSR in
high bandwidth applications, especially those that deliver a significant amount of streaming content. In such applications, it is not
necessary for Equalizer to receive and examine the server’s responses: the client makes a request and the server simply streams a
large amount of data to the client.
DNS
Domain Name System or Domain Name Service; used to map domain names to Internet servers in order to link to IP addresses or
map IP addresses to domain names. See IP address.
DNS TTL
The amount of time, in seconds, that a name server is allowed to cache the domain information. See DNS and TTL.
domain
The highest level in an IP address and the last part of the address in the URL. The domain identifies the category under which the
Web site operates. For example, in www.coyotepoint.com, com is the domain, where com represents a commercial site. See
domain name, IP address, and subdomain. See also DNS.
domain name
The owner of an IP address. The next highest level in an IP address and the next-to-last part of the address. For example, in www.-
coyotepoint.com, coyotepoint is the domain name. See domain, IP address, and subdomain. See also DNS.
dual stack networking
Dual-stack networking is a transition technology in which IPv4 and IPv6 coexist and operate in tandem and independently over
shared or dedicated links. In a dual-stack network, IPv4 and IPv6 are fully deployed across the network infrastructure so that con-
figuration and routing protocols handle both IPv4 and IPv6 addressing.
dynamic weight
The weight that Equalizer assigns to a particular server during operation. See server weight, initial weight, and weight.
E
echo
An IP address-port pair that identifies the start or end of an address; a value that ends a process.
Enhanced NAT
NAT performed by a load balancer with protocol-specific knowledge in order to make certain protocols with with load balancing.
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