Glossary Terms

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An encryption algorithm which utilizes the DES algorithm three times in succession.


See Asynchronous Control Character Mask.

are you there

Any packet (for example, an ARP Request) that produces a response, sent to determine whether the DUT is able to respond.

autonomous system boundary router

ABR located between an OSPF autonomous system and a non-OSPF network. ASBRs run both OSPF and another routing protocol, such as RIP. ASBRs must reside in a nonstub OSPF area.


Part of a network that acts as the primary path for traffic that is most often sourced from, and destined for, other networks.

border gateway protocol version 4

Interdomain routing protocol that exchanges reachability information with other BGP systems. It is defined by RFC 1163. BGP4 supports CIDR and uses route aggregation mechanisms to reduce the size of routing tables.

challenge handshake authentication protocol

A protocol that runs over LCP and is used to authenticate connections over a PPP connection.

chassis chain

Two or more Ixia chassis connected together through special sync-in/sync-out cables. Load modules in a chassis chain are synchronized to within 10 ns.

classless interdomain routing

Technique supported by BGP4 and based on route aggregation. CIDR allows routers to group routes together to reduce the quantity of routing information carried by the core routers. With CIDR, several IP networks appear to networks outside the group as a single, larger entity. With CIDR, IP addresses and their subnet masks are written as four octets, separated by periods, followed by a forward slash and a two-digit number that represents the subnet mask.


As an IxLoad component, a simulation of a user operating a Web browser. Clients are simulated by software on CPUs associated with ports on specialized load modules.