Class C; Calculating Ip Address Range - Dedicated Micros dv-ip Setup Manual

Class C

A Class C network is the most commonly used class, and is available for small to medium sized
business. The allocated network portion is the first three octets, with the remaining octet being the host
address.
Class B address range
192.0.1.x
223.255.255.x
Class C Address Range
This identifies the range of network address that are within the Class C address range; 192.0.0 –
223.255.255.
Subnet Mask
This shows that the first three octets are masked by the subnet which identifies the Network ID and the
remaining octet is the Host ID's.
Alternative Format
There are two ways an IP address can be written;
192.168.3.55 255.255.255.0
192.168.3.55/24 - which identifies that the first 24 bits (3 octets) are the Network ID
Both addresses are the same they are just written in a different format.

Calculating IP Address Range

If we are to include an address range within the Firewall option, it is necessary to:
•
Identify the IP address range
•
Calculate the subnet mask
The following tables show the format for each Class (A, B, C), they include the IP address and number
of bits allocated to the network address, equivalent subnet mask, IP address range and number of
hosts.
Use these tables to assist you in entering the correct information.
Dedicated Micros Ltd
Subnet mask
255.255.255.0
255.255.255.0
Alternative Format
192.0.1.x/24
223.255.255.x/24
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