NonStop S-Series Planning and Configuration Guide (G06.25+)

Terms and Concepts
HP NonStop S-Series Planning and Configuration Guide—523303-015
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IP Addresses
For example, to determine the network address and local address from the IP address
192.6.1.1:
The number of networks and hosts and the address ranges for each IP address class
are:
Host Names and Domains
When a host is assigned a unique IP address, the host is usually also assigned a
unique host name. If a host can communicate with systems worldwide, its name must
be unique throughout the world. The Domain Name System (DNS) defines a
hierarchical, yet distributed, database of information about hosts on a network. The
hierarchy allows the name space to be divided into independently managed partitions
called domains. You can ensure that your host name is unique by requesting domain
names from the NIC. (This process is very similar to the assignment of IP addresses.)
Host names have two component parts that identify a name domain and a specific host
within that domain. Host names are written as a series of labels separated by dots,
starting with a computer’s name, then the locally created domains to the NIC delegated
domain, and finally the top-level domain.
This example shows a fully qualified host name for the host named mypc in the domain
DevInc.com:
mypc.DevInc.com
Locally you can refer to the computer as mypc. A user outside your local network
would refer to the computer as mypc.DevInc.com. The NIC ensures that
DevInc.com is unique, and the local administrator ensures that mypc is unique within
the DevInc.com domain.
Address
Class
Number of
Networks
Number of
Hosts/Network Address Range
A 127 16,777,215 0.0.0.0-127.255.255.255
B 16,383 65,535 128.0.0.0-191.255.255.255
C 2,097,151 255 192.0.0.0-223.255.255.255
Reserved - - 224.0.0.0-255.255.255.255
1 1 0 0 0 0 0 0 . 0 0 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 1
Network Address = 192.6.1
Indicates Class C
Local Address = 1
VST915.vsd