Operation Manual

Table 13.2:
Specic Addresses
DescriptionAddress Type
This is the netmask AND any address
in the network, as shown in Exam-
Base Network Address
ple 13.2, “Linking IP Addresses to the
Netmask” (page 228) under Result.
This address cannot be assigned to any
hosts.
This basically says, “Access all hosts
in this subnetwork.” To generate this,
Broadcast Address
the netmask is inverted in binary form
and linked to the base network address
with a logical OR. The above example
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.
Local Host
A connection can be set up to your own
machine with this address and with all
addresses from the complete
127.0.0.0/8 loopback network as
dened with IPv4. With IPv6 there is
just one loopback address (::1).
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 specied in
RFC 1597 and listed in Table 13.3, “Private IP Address Domains” (page 230).
Basic Networking 229