F5 WANJet 500, Platform Manual

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Glossary
Platform Guide: WANJet
®
500 Glossary - 1
active unit
In a redundant system, the active unit is the system that currently optimizes
connections. If the active unit in the redundant system fails, the standby unit
assumes control and begins to optimize connections. See also
redundant
system .
Application QoS
Application QoS provides better service for specific data flows by
configuring policies that can adjust the bandwidth consumed by specific
types of network traffic (also referred to as
traffic shaping ). This way, you
can use the network bandwidth optimally for critical network traffic. See
also
Quality of Service (QoS) level .
Connection Interception (CI)
Connection Interception (CI) intercepts and resets connections that were
initiated before the WANJet appliance became active on the network.
failover
Failover is the process whereby a standby unit in a redundant system takes
over when a software failure or a hardware failure is detected on the active
unit.
field replaceable unit (FRU)
An FRU is a part of the appliance that is replaceable. You can order FRUs to
replace certain parts of the unit including the fan tray, fan filter, drive tray,
and power supply.
generic routing encapsulation
Generic routing encapsulation (GRE) tunneling typically connects private IP
networks over an Internet connection using two routers (or switches) that
support GRE encapsulation.
Layer 1 through Layer 7
Layers 1 through 7 refer to the seven layers of the Open System
Interconnection (OSI) model. Thus, Layer 1 represents the physical layer,
Layer 2 represents the data-link layer, Layer 3 represents the IP layer, and
Layer 4 represents the transport layer (TCP and UDP). Layer 5 manages
connections between applications, and Layer 6 represents the presentation
layer. Layer 7 represents the application layer, handling traffic such as
HTTP and SSL.
LCD
LCD stands for liquid crystal display. An LCD panel is available on the
front of the WANJet 500 platform. You can use the LCD and its associated
keypad to configure the LAN, WAN, and Management ports on the unit and
perform basic administration tasks.