Ip Addressing; What Is An Ip Address; Private And Public Address Ranges; Multicast Address Range - Extron electronics SMP 351 User Manual

IP Addressing

What is an IP Address?

A full explanation of IP addressing is beyond the scope of this user guide. However, the
following information is enough to get started.
An IP address is a 32-bit binary number that is used to identify each device on an Ethernet
network. This number is usually represented by four decimal numbers (each in the
range 0 to 255) separated by dots, (for example, 198.123.34.240). This is called
"dotted decimal notation".
An IP address is divided into two parts:
•
•
On a given network, each address must have the same network identifier value, but have a
unique host identifier. There are, therefore, different classes of addresses that define:
•
•
The most common IP address classes are:
Class
Class A
Class B
Class C
NOTES:

Private and Public Address Ranges

Within each of the above classes are a range of addresses designated as "private"
addresses. These are addresses that should only be used on private local networks and
intranets and cannot be accessed directly from the Internet.
•
•
•
•
Addresses outside these ranges are considered "public".

Multicast Address Range

A further range of addresses is available for multicast use:
•
These addresses (also known as class D addresses) are used to allow several devices to be
part of the same multicast group. Each device in the group has the same multicast address
and can effectively send data to all other devices in the same group simultaneously.
The SMP 351 uses 239.199.188.138 as the default multicast address for the archive
stream and 239.199.188.142 as the confidence stream default.
The network identifier
The host identifier
The range of valid addresses.
The parts of the address used to identify the network and host.
Valid Address Range
to
0.0.0.1 127.255.255.254
through
128.0.0.1
through
192.0.0.1
• = Network identifier
NNN
•
= Host identifier
HHH
10.0.0.0 – 10.255.255.255
172.16.0.0 – 172.31.255.255
169.254.0.0 – 169.254.255.255
192.168.0.0 – 192.168.255.255
224.0.0.0 – 239.255.255.255
Identifier Arrangement
NNN.HHH.HHH.HHH
191.255.255.254 NNN.NNN.HHH.HHH
NNN.NNN.NNN.HHH
223.255.255.254
SMP 351 • Reference Information 188