Справочник Пользователя для Insys GPRS 5.0 Ethernet 11-02-01-03-10.018
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11-02-01-03-10.018
INSYS GPRS 5.0 Ethernet
Functions
Dez-06
31
If only one router is available, this router is defined one time as standard gateway. It will
then receive all IP packets which are not meant for the own network segment. It will as-
sume the correct forwarding to the according destination network.
This forwarding is done without any changes at the IP packets. The recipient will thus
know the sender and will also know exactly, where the IP packet is from.
It can be said that the source and destination are "communicating" with each other di-
rectly. Each computer in the network segment can establish a direct connection with any
other computer in the network. This is possible, because each IP address is only present
once in the entire network. Source and destination are therefore uniquely defined.
5.3.2
Private and public IP addresses
For each network segment which consists of public IP addresses, routing tables exist in
the Internet by means of which a connection between two IP addresses from different
segments may be established.
In the entire possible IP address range there are private IP addresses, which are not
routed in the Internet.
Private IP addresses were defined to be able to provide many, small, non-public networks
with IP addresses, which would usually not require a direct connection to each other. The
same address ranges can thus be used for several networks, which drastically reduces
the use of IP addresses which are available in the limited possible address space.
Private IP addresses may be taken from the following ranges.
the Internet by means of which a connection between two IP addresses from different
segments may be established.
In the entire possible IP address range there are private IP addresses, which are not
routed in the Internet.
Private IP addresses were defined to be able to provide many, small, non-public networks
with IP addresses, which would usually not require a direct connection to each other. The
same address ranges can thus be used for several networks, which drastically reduces
the use of IP addresses which are available in the limited possible address space.
Private IP addresses may be taken from the following ranges.
10.0.0.0/8
( 10. 0.0.1 - 10.255.255.254)
169.254.0.0/16
(169.254.0.1 - 169.254.255.254)
172.16.0.0/12
(172. 16.0.1 - 172. 31.255.254)
192.168.0.0/16
(192.168.0.1 - 192.168.255.254)