Configuration Examples
94
Introduction to TCP/IP
In a single LAN it is possible to use various protocols for the transmission of data. The
connection between a workstation computer and the OpenCom 100 runs via the IP
protocol (also named TCP/IP) used on the Internet. IP can be used together with other
protocols (e.g. NetBEUI, AppleTalk or IPX/SPX) on the same network.
Every device participating in data transmission using IP requires a unique IP address.
An IP address consists of four groups of digits from 0 to 255, each separated by a full
stop. The supplementary protocols DHCP and PPP automatically assign IP addresses
to devices. Class C networks normally use IP addresses in which the first three
numbers are the same and the last number is uniquely assigned to a specific device in
the LAN. On the Internet, unique addresses assigned by a special organisation created
for this purpose are used. Within a LAN, you can use addresses which are not unique
world-wide:
IP enables the establishment of connections via one or more intermediate stations.
The decision whether to connect directly or indirectly to the partner device depends
on the network mask. The network mask for a class C network is 255.255.255.0. If the
IP address of the partner device does not fit the network mask, the connection is
established via the default gateway. If a device knows several data routes to different
intermediate stations, one speaks of a router.
IP server present
No DHCP server present
Special case when integrating the
OpenCom 100 in a LAN; settings in the
Network: LAN menu must be
coordinated with the responsible
system administrator
IP Range Common Netmask Comment
192.168.0.0-
192.168.255.255
255.255.255.0 256 smaller networks
172.16.0.0-172.31.255.255 255.255.0.0 16 medium networks
10.0.0.0-10.255.255.255 255.0.0.0 1 large network
Server configuration in the LAN OpenCom 100 Functions
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