ELSA LANCOM Business LC-4X00, Manual

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Glossary
ELSA LANCOM Business
147
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Proxy ARP – Proxy ARP ensures that sta-
tions that are normally connected directly to a
local TCP/IP network and thus have a suitable
local IP address are also available through a
router (and thus via a WAN connection). The
router identifies itself as the remote station
during ARP queries in the local network, i.e.
revealing its own MAC address. It can then
receive data packets and forward them to the
remote station.
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RIP – Routing Information Protocol; used for
the transfer of router information in networks
(in this case, Netware IPX).
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RoundRobin – A process for dialing up a log-
ical remote station (e.g. company headquar-
ters) using a variety of numbers for different
devices. In the event that the default remote
station is busy, other remote stations are au-
tomatically dialed.
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Router – A router is a device to connect two
networks with identical layer-3 structures in
the
­
OSI model. Such a router can consist of
two devices connected to one another by a
data transfer route. This constellation is also
known as a remote router.
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RTS – Request to Send
쮿
S
0
line connection – Subscriber interface
of the Basic Rate Interface. This interface is
a bus permitting the connection of up to eight
ISDN terminal devices. Up to 12 sockets can
be installed on this bus.
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SAP – Service Advertising Protocol. Used for
the distribution of services in NetWare net-
works.
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Server – A server is a provider of services
used by
­
clients. Many network operating
systems use a client-server architecture, i.e. a
specific, very powerful computer serves data
and programs to a large number of clients
(workstations).
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Short hold mode – A connection is termi-
nated after a specified period in which no
data has been transferred. This can be used
to ensure that the connection will be held un-
til no further data is being transferred.
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SNMP – Simple Network Management Pro-
tocol; standardized protocol for the manage-
ment of network components; advantage:
monitoring of a variety of network compo-
nents using one and the same user interface
(such as HP Openview or Cabletron Spec-
trum); not specific to any manufacturer;
ELSA
LANCOM supports SNMP Version 1.
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Socket – ID number for the service under
which a data packet is sent.
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Spoofing – Spoofing is a method to avoid
unnecessary connection charges. All queries
from the LAN side are answered directly by
the router without establishing a connection
or sending data to the remote station.
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SPX – Sequenced Packet eXchange = a pro-
tocol defined by Novell for the secure transfer
of data in a network. This protocol is realized
on PCs using the NETX.COM or similar driv-
ers.
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SPX watchdog – Packets sent at specific in-
tervals by the server to monitor an SPX con-
nection.
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SPV – Semi-permanent connection = pre-or-
dered long-term dial-up connection. Semi-
permanent connection are currently available
for the
­
1TR6 protocol and can be estab-
lished between any two ISDN connections.
The connection is effected separately for
each B channel. The billing of communica-
tions charges is no longer based on connect
time when a semi-permanent connection has