Installation guide

DirectOut Technologies
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page 26 of 30 © 2012 DirectOut GmbHD.O.TEC
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M.1k2 Hardware & Installation Guide - Version 1.1
Appendix D
Appendix D
Howto-Network
The following guide aims to familiarize with basic information to set-
up a TCP-IP network. Some terms and techniques are explained to
conduct you through the first steps.
Terms
IP Address - Address of a device within your local network. Must be
unique. Example: 192.168.74.15 or 10.0.0.24
Gateway - Address of the network router. When connecting only
two devices ‘peer to peer’, use the ip address of one device if it is
needed to be declared. Example: 192.168.74.1 or 10.0.0.20
DNS - Address of Domain Name Server. If you are using a network
router with internet access the IP address of the router can be used
here. One may define a second DNS for use once the first one fails.
Example: 8.8.8.8
Networkrouter-device that handles the traffic within a network.
Often used with integrated ADSL modem. Not necessary to setup a
peer to peer connection between two devices only. Has IP address
(Gateway).
DHCP - Dynamic host configuration protocol. It is used to assign
address parameters automatically to devices that are connected to
a DHCP server. Network router often act as DHCP server.
Network Mask - a bitmask that splits the network into two parts
• Network contingent: fixed - identical for all devices
• Device contingent: variable - unique for each device, defines
the number of available addresses within the network
The network mask (like the IP address) contains of 32 bits and is
often expressed by decimals. The result of two binary calculations
defines both contingents.
Example:
IP address
1100’0000 1010’1000 0100’1010 0000’1111
19 2.168.74.15
AND network mask
1111’1111 1111’1111 1111’1111 0000’0000
255.255.255.0
network contingent
1100’0000 1010’1000 0100’1010 0000’0000
19 2.168.74.0
IP address
1100’0000 1010’1000 0100’1010 0000’1111
192.168.74.15
NAND network mask
0000’0000 0000’0000 0000’0000 1111’1111
255.255.255.0
device contingent
0000’0000 0000’0000 0000’0000 0000’1111
19 2.168.74.15
24 bits are already set for the network contingent, leaving 8 bits
(2
8
= 256) left for the variable device contingent. The smallest ad-
dress 192.168.74.0 defines the network and the biggest address
192.168.74.255 is reserved. So there are 254 different IP addresses
available (192.168.74.1 - 192.168.74.254).