Manual

39
Glossary
English
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Ethernet address (MAC)
A splitter box is identified by its MAC address, encoded in 6 bytes.
The first three bytes are fixed; they identify the manufacturer.
The next three are unique values assigned to each splitter box.
This address is fixed and cannot be modified. It can be seen on the label stuck on
the side of the casing.
IP address
All equipment connected to an Ethernet network must have a unique IP address.
This address makes it possible to refer to a specific unit.
ARP and Telnet
The IP address is assigned manually, using an online command utility (under
UNIX or Windows) that also allows the network parameters to be configured. Only
one person at a time can be connected to the configuration port (port 9999). This
precaution eliminates any risk of several people attempting to configure the unit.
Auto IP
This automatic method is recommended if there is a small group of hosts rather
than a large network. It allows the hosts to negotiate the addresses with one
another and assign them accordingly, in this way creating a small network.
DHCP
The DHCP server automatically assigns the IP address and provides the network
configuration. The IP address will be different for each reconnection to the network
or restart.
Subnet mask
The subnet mask defines a range of IP addresses that can be accessed from an
item of equipment.
Port number
All TCP connections and all UDP datagrams are defined by a destination
IP address and a port number. For example, a Telnet application generally uses
port 23. A port number is similar to the last part of a telephone number for a public
switched telephone network.
The serial channel of the unit (its port) can be associated with a particular
TCP⁄UDP port number. Port number 9999 is reserved for accessing the unit’s
configuration window.
UDP
User Datagram Protocol
This protocol is mainly used for broadcasting under TCP/IP.
Glossary