Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 11-05-2007, Руководство по установке

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Table 30.2 Specific Addresses
Description Address Type
This is the netmask AND any address in the network, as shown
in
Example 30.2, “Linking IP Addresses to the Netmask”
Base Network Ad-
dress
(page 548) under
Result
. This address cannot be assigned to
any hosts.
This basically says, “Access all hosts in this subnetwork.” To
generate this, the netmask is inverted in binary form and linked Broadcast Address
to the base network address with a logical OR. The above ex-
ample therefore results in 192.168.0.255. This address cannot
be assigned to any hosts.
The address
127.0.0.1
is assigned to the “loopback device”
on each host. A connection can be set up to your own machine
with this address.
Local Host
Because IP addresses must be unique all over the world, you cannot just select random
addresses. There are three address domains to use if you want to set up a private IP-
based network. These cannot get any connection from the rest of the Internet, because
they cannot be transmitted over the Internet. These address domains are specified in
RFC 1597 and listed in
Table 30.3, “Private IP Address Domains” (page 549).
Table 30.3 Private IP Address Domains
Domain Network/Netmask
10.x.x.x 10.0.0.0
/
255.0.0.0
172.16.x.x
–
172.31.x.x 172.16.0.0
/
255.240.0.0
192.168.x.x 192.168.0.0
/
255.255.0.0
Basic Networking 549