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Page 76 / 89 Scroll up to view Page 71 - 75
76
Glossary
Gigaset SE587 WLAN dsl / eng / A31008-N1083-L171-1-7619 / glossary.fm / 12.12.2007
Schablone 2004_08_26
Internet
The Internet is a wide-area network (
WAN
) linking several million users around the
world. A number of
Protocols
have been created for exchanging data, and these are
known collectively as
TCP/IP
protocol stack. All participants on the Internet can be iden-
tified by an
IP address
. Servers are addressed by
Domain names
(e.g. siemens.com).
Domain names are assigned to IP addresses by the Domain Name Service (
DNS
).
These are some of the main Internet services:
u
Electronic mail (e-mail)
u
The World Wide Web (WWW)
u
File transfer (FTP)
u
Discussion forums (Usenet / Newsgroups)
Internet service provider
An Internet service provider, for example Tiscali, offers access to the
Internet
for a fee.
IP
Internet protocol
The IP
Protocol
is one of the
TCP/IP
protocols. It is responsible for addressing parties in a
network using
IP addresses
and routes data from the sender to the recipient. It decides
the paths along which the data packets travel from the sender to the recipient in a com-
plex network (routing).
IP address
The IP address is the unique network-wide address of a network component in a net-
work based on the
TCP/IP
protocols (e.g. in a local area network (
LAN
) or on the
Inter-
net
). The IP address has four parts (each with up to three-position digit sequences) sep-
arated by full stops (e.g. 192.168.1.1). The IP address comprises the network number
and the computer number. Depending on the
Subnet mask
, one, two or three parts
form the network number; the remainder form the computer number. You can find out
the IP address of your PC using the
ipconfig
command.
IP addresses can be assigned manually (see
Static IP address
) or automatically (see
Dynamic IP address
).
On the Internet
Domain names
are normally used instead of IP addresses. The
DNS
is
used to assign domain names to IP addresses.
The Gigaset SE587 WLAN dsl has a
Private IP address
and a
Public IP address
.
IPoA
IP over ATM
IP pool range
The Gigaset SE587 WLAN dsl's IP address pool defines a range of
IP addresses
that the
router's
DHCP server
can use to assign
Dynamic IP addresses
.
Page 77 / 89
77
Glossary
Gigaset SE587 WLAN dsl / eng / A31008-N1083-L171-1-7619 / glossary.fm / 12.12.2007
Schablone 2004_08_26
ISP
See
Internet service provider
LAN
Local network
A local area network (or local network) links network components so that they can
exchange data and share resources. The physical range is restricted to a particular area
(a site). As a rule the users and operators are identical. A local network can be con-
nected to other local networks or to a wide-area network (
WAN
) such as the
Internet
.
With the Gigaset SE587 WLAN dsl you can set up a wired local
Ethernet
network and a
wireless
IEEE 802.11g
standard network (
WLAN
).
Local IP address
See
Private IP address
MAC address
Media Access Control
The MAC address is used for the globally unique identification of
Network adapters
. It
comprises six parts (hexadecimal numbers), e.g. 00-90-96-34-00-1A. The MAC address
is assigned by the network adapter manufacturer and should not be changed.
Mbps
Million bits per second
Specification of the transfer speed in a network.
MER
MAC Encapsulated Routing
MRU
Maximum Receive Unit
The MRU defines the maximum user data volume within a data packet.
MTU
Maximum Transmission Unit
The MTU defines the maximum length of a data packet that can be carried over the net-
work at any one time.
Page 78 / 89
78
Glossary
Gigaset SE587 WLAN dsl / eng / A31008-N1083-L171-1-7619 / glossary.fm / 12.12.2007
Schablone 2004_08_26
NAT
Network Address Translation
NAT is a method for converting IP addresses (
Private IP addresses
) within a network into
one or several
Public IP addresses
on the
Internet
. With NAT, several network compo-
nents in a
LAN
can share the router's public IP address to connect to the Internet. The
network components of the local network are hidden behind the router's IP address reg-
istered on the Internet. Because of this security function, NAT is frequently used as part
of the
Firewall
of a network. If you want to make services on a PC in the local network
available on the Internet despite NAT, you can configure the Gigaset SE587 WLAN dsl as
a
Virtual server
.
Network
A network is a group of devices connected in wired or wireless mode so that they can
share resources such as data and peripherals. A general distinction is made between
local networks (
LANs
) and wide-area networks (
WANs
).
Network adapter
The network adapter is the hardware device that creates the connection between a net-
work component and a local network. The connection can be wired or wireless. An Eth-
ernet network card is an example of a wired network adapter. The Gigaset PC Card 108
and the Gigaset USB Adapter 108 are examples of wireless network adapters.
A network adapter has a unique address, the
MAC address
.
Public IP address
The public
IP address
(also known as the global IP address) is a network component's
address on the
Internet
. It is assigned by the
Internet service provider
. Devices that cre-
ate a link from a LAN to the Internet, such as the Gigaset SE587 WLAN dsl, have a public
and a
Private IP address
.
Port
Data is exchanged between two applications in a network across a port. The port
number addresses an application within a network component. The combination of
IP
address
/port number uniquely identifies the recipient or sender of a data packet within
a network. Some applications (e.g. Internet services such as HTTP or FTP) work with
fixed port numbers; others are allocated a free port number whenever they need one.
Port forwarding
In port forwarding, the Gigaset SE587 WLAN dsl directs data packets from the
Internet
that are addressed to a particular
Port
to the corresponding port of the appropriate net-
work component. This enables servers within the local network to offer services on the
Internet without them needing a
Public IP address
.
See also:
Virtual server
Page 79 / 89
79
Glossary
Gigaset SE587 WLAN dsl / eng / A31008-N1083-L171-1-7619 / glossary.fm / 12.12.2007
Schablone 2004_08_26
PPPoA
Point-to-Point Protocol over ATM
PPPoA is a
Protocol
for connecting network components in a local Ethernet network to
the
Internet
via an ATM network.
PPPoE
Point-to-Point Protocol over
Ethernet
PPPoE is a
Protocol
for connecting network components in a local Ethernet network to
the
Internet
via a modem.
Private IP address
The private
IP address
(also known as the local IP address) is a network component's
address within the local network (
LAN
). The network operator can assign any address
he or she wants. Devices that act as a link from a local network, such as the Gigaset
SE587 WLAN dsl, have a private and a
Public IP address
.
Protocol
A protocol describes the agreements for communicating in a network. It contains rules
for opening, administering and closing a connection, as well as in relation to data for-
mats, time frames and possible troubleshooting. Communication between two applica-
tions requires different protocols at various levels, for example the
TCP/IP
protocols for
the
Internet
.
PVC
Permanent Virtual Circuit
A permanent virtual circuit is a logical connection in an ATM network. Multiple PVCs can
share the same physical connection at the same time.
Radio network
See
WLAN
Rekey interval
The rekey interval is the period after which new keys are automatically generated for
data encryption with
WPA-PSK
.
Remote management
Remote management refers to the ability to manage a network from a network compo-
nent that is actually outside the local network (
LAN
).
Repeater
A repeater extends the range of a wireless local network by relaying data from the
Access point
to additional PCs or
Network adapters
.
Page 80 / 89
80
Glossary
Gigaset SE587 WLAN dsl / eng / A31008-N1083-L171-1-7619 / glossary.fm / 12.12.2007
Schablone 2004_08_26
Roaming
Roaming extends the range of a wireless LAN by using several
Access points
that use the
same
SSID
and the same radio channel and are linked via
Ethernet
. The PCs in the net-
work can switch dynamically between several access points without losing the existing
network connection.
Router
A router directs data packets from one local network (
LAN
) to another via the fastest
route. A router makes it possible to connect networks that have different network tech-
nologies. For example, it can link a local network with
Ethernet
or
WLAN
technology to
the
Internet
.
See also:
Bridge
,
Switch
,
Hub
,
Gateway
Server
A server makes a service available to other network components (
Clients
). The term
"server" is often used to refer to a computer or PC. However, it can also mean an appli-
cation that provides a particular service such as
DNS
, Web server, file server or print
server.
SMTP
Simple Mail Transfer Protocol
The SMTP
Protocol
is part of the
TCP/IP
protocol family. It governs the exchange of elec-
tronic mail on the
Internet
. Your
Internet service provider
provides you with access to an
SMTP server.
SNMP
Simple Network Management Protocol
The SNMP
Protocol
is part of the
TCP/IP
protocol family. It provides a simple procedure
for administering the network based on a system of shared information for manage-
ment data and network management messages (known as traps) and reports the occur-
rence of events within the monitored network (e.g. an alarm message or notification of
configuration changes).
SSID
Service Set Identifier
The SSID is used to identify the stations in a wireless network (
WLAN
). All wireless net-
work components with the same SSID form a common network. The SSID can be
assigned by the network operator.
Static IP address
A static
IP address
is assigned to a network component manually during network con-
figuration. Unlike the
Dynamic IP address
, a static (fixed) IP address never changes.
Subnet
A subnet divides a network into smaller units.

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