Subnet Mask - Panasonic DX-2000 Service Manual

10.3.2 Subnet Mask

A subnet mask defines how sub-segments of a network are treated.
IP
192.168.32.1
Subnet Mask
255.255.255.0
Network
Address
192.168.32.0
Global IP
Address
190.0.0.0
255.255.0.0
Note
Upper: IP address
Lower: Subnet mask
For network management purposes, special IP addresses are assigned.
1. Host address is set to all "0"
2. Host address is set to all "1"
Reserved for IP broadcasting to all subnet stations.
3. All 4 octets are set to all "1"
IP broadcast of 255.255.255.255 can be passed over the router when the network address is specified. Normally, this is used
for DHCP (Dynamic Host Configuration Protocol) network.
4. All 4 octets are set to all "0"
Reserved for default route for non-destination address
5. Most significant bit starting with "127"
Reserved for loop back address
1 1 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1
192
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
255
IP
Subnet Mask
1 1 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
Network Address Configuration
190.0.3.1
255.255.255.0
Router
190.0.2.1
255.255.255.0
190.0.1.1
255.255.255.0
Class B Subnet Outline
168 32
255 255
190.0.3.2
255.255.255.0
190.0.2.2
255.255.255.0
190.0.1.2
255.255.255.0
329
1
0
Third
Floor
190.0.3.3
255.255.255.0
Second
Floor
190.0.2.3
255.255.255.0
Ground
Floor
190.0.1.3
255.255.255.0