Appendix 3
Appendix 3 - Utilizing IP Addresses on a Local Network
1. Introduction
A lot of business is done via the Internet. We share information by transmitting it through
Currently, IP addresses are limited. There are currently five classes of networks in the world and a given network contains many IP addresses. A network can only have a limited number of IP addresses. The numbers depends on the network class. Five classes of network are given letters A through E, and the most common one is the
2. IP construction and Network class
1) IP construction
xxx | xxx | xxx | xxx |
X1 | X2 | X3 | X4 |
(xxx: 0 – 255)
2) Network class
A class: A local network that contains IP addresses from 0 to 127 at ‘X1’.
Network ID: X1
Host ID: X2, X3, X4
Total number of
B class: A local network that contains IP addresses from 128 to 191 at ‘X1’.
Network ID: X1, X2
Host ID: X3, X4
Total number of
C class: An Internet network that contains IP addresses from 192 to 223 at ‘X1’.
Network ID: X1, X2, X3
Host ID: X4
This is the most common network in the world and the total number of
D class: A network that contains IP addresses from 224 to 239 at ‘X1’. A
E class: A network that contains IP addresses from 240 to 254 at ‘X1’. The
3.C-class Networks
1) Features of Addresses
IP address: The three digits in ‘X4’ are for the Host ID and the numbers are allowed from 0 to 255. Among the numbers, 0 is used for the Network ID, 1 is used for Router IP (Gateway address) and 255 is used for a Broadcast address. Therefore, the numbers from 2 to 244 are IP addresses that can be assigned to VersaCam, PCs, etc.
Network ID: This is to identify a network. Generally the first number is assigned as a Network ID.
Gateway address: This is an IP address of the router that is connecting the Internet and a local network. Remote users can access a local network over the Internet through a gateway (router). Generally, the second number is assigned as the Gateway address.
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