Owner`s manual

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generated for each packet, supports message integrity and
sequencing rules and supports re-keying mechanisms.
triggers Triggers are used to deal with application protocols that create
separate sessions. Some applications, such as NetMeeting,
open secondary connections during normal operations, for
example, a connection to a server is established using one port,
but data transfers are performed on a separate connection. A
trigger tells the device to expect these secondary sessions and
how to handle them.
Once you set a trigger, the embedded IP address of each
incoming packet is replaced by the correct host address so that
NAT can translate packets to the correct destination. You can
specify whether you want to carry out address replacement, and
if so, whether to replace addresses on TCP packets only, UDP
packets only, or both.
twisted pair The ordinary copper telephone wiring used by telephone
companies. It contains one or more wire pairs twisted
together to reduce inductance and noise. Each telephone
line uses one pair. In homes, it is most often installed with
two pairs. For Ethernet LANs, a higher grade called Category
3 (CAT 3) is used for 10BASE-T networks, and an even
higher grade called Category 5 (CAT 5) is used for
100BASE-T networks. See 10BASE-T, 100BASE-T,
Ethernet.
unnumbered interfaces An unnumbered interface is an IP interface that does not
have a local subnet associated with it. Instead, it uses a
router-id that serves as the source and destination address
of packets sent to and from the router. Unlike the IP address
of a normal interface, the router-id of an unnumbered
interface is allowed to be the same as the IP address of
another interface. For example, the WAN unnumbered
interface of your Commander Pulse uses the same IP
address of the LAN interface (192.168.1.1).
The unnumbered interface is temporary – PPP or DHCP will
assign a ‘real’ IP address automatically.
upstream The direction of data transmission from the user to the
Internet.
USB Universal Serial Bus
A serial interface that lets you connect units such as printers,
scanners, etc. to your computer by simply plugging them in.
VC Virtual Circuit
A connection from your DSL router to your ISP.
VCI Virtual Circuit Identifier
Together with the Virtual Path Identifier (VPI), the VCI
uniquely identifies a VC. Your ISP will tell you the VCI for
each VC they provide. See VC.
VPI Virtual Path Identifier
Together with the Virtual Circuit Identifier (VCI), the VPI
uniquely identifies a VC. Your ISP will tell you the VPI for
each VC they provide. See VC.
WAN Wide Area Network
Any network spread over a large geographical area, such as