Asus CX200 User Manual

Page 89

ASUS CX200 Internet Camera

Class

Value of

First Octet

Network ID

Host ID

Number of Hosts

1-126

First octet

Last three

octets

16,387,064

128-191

First two

octets

Last two

octets

64,516

192-223

First two

octets

Last octet

254

Any value between 0 and 255 is valid as a host ID octet except for those

values the InterNIC reserves for other purposes.

Value

Purpose

0, 255

Subnet masking

127

Loopback testing and interprocess communication on

local devices

224-254

IGMP multicast and other special protocols.

Subnetting and Subnet Masks
Subnetting divides a network address into sub-network addresses to

accommodate more than one physical network on a logical network.
For example:
A Class B company has 100 LANs (Local Area Networks) with 100 to

200 nodes on each LAN. To classify the nodes by its LANs on one

main network, this company segments the network address into 100

sub-network addresses. If the Class B network address is 150.1.x.x, the

address can be segmented further from 150.1.1.x through 150.1.100.x