Technical data

Glossary • 219
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
STP
With the STP cable (Shielded twisted pair) it acts around a symmetrical
cable with in pairs stranded and protected veins. The classical STP cable is a
multi-core cable, whose stranded conductors are isolated. The conductors of
the STP cable are individually protected. It has no total screen.
S-STP
Beside the STP cables there is cable, which has total shielding from foil or
network shielding additionally to the single shielding of the conductors still
another. These cables are called S/STP cables: Screened/Shielded twisted
pair.
Structured cabling
This specifies the maximum permissible cable lengths (EIA/TIA 568, IS
11801) and gives recommendations for the different types topology for
ground area, building and floor cabling.
Subnet
A portion of a network that shares the same network address as the other
portions. These subnets are distinguished through the subnet mask.
Subnet mask
The subnet mask can be used to manipulate the address areas in the IP
address room with reference to the number of subnets and subscribers. A
standard subnet mask is, for example, 255.255.255.0.
S-UTP
Screened unshielded twisted pair cable which only has one external shield.
However, the twisted pair cables are not shielded from each other.
Switch
Switches are comparable to bridges, but with several outputs. Each output
uses the full ETHERNET bandwidth. A switch switches a virtual connection
between an input port and an output port for data transmission. Switches
learn which nodes are connected and filter the information transmitted over
the network accordingly. Switches are inteligent devices that learn the node
connections and can transfer data at the switch and not have to send it back
to the main server.