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IP-Adresses are used in networks which are working with the Internet-Protokoll (IP) to transport datas from sender to a specific receiver. As Example we can take the Internet, or private networks, which can be also connections between Dreamboxes and PCs.
IP Adresses in V4 are 4 numbers inbetween 0 and 255, seperated by a dot, eg. 127.0.0.1, which is used for "localhost".
There are three categories:
- IP-Adresses (like they are used at the Internet)
- Private IP Adresses (used in private networks)
- virtual IP-Adresses (the dynamic IP-Adress of an activ/passiv-cluster)
Here we just talk about private IP-Adresses, like we need them in our private network with our Dreambox.
Private IP-Adresses are belonging to a special Ip-Adress-Range, which is not routet at the Internet. They can be used by everybody for his own LAN.
So you can give IP-Adresses in your LAN by your own. But: Therefore should only be taken Adresses from private networks, as in RFC 1918 listed.
This would be the following:
The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets: 10.0.0.0 - 10.255.255.255 (10/8 prefix) 172.16.0.0 - 172.31.255.255 (172.16/12 prefix) 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
The most used adresses may be the 192.168.x.x.