Brother RJ4040 RuggedJet w/WiFi User Manual page 27

Appendix B
Subnet mask
Subnet masks restrict network communication.
 Example: Computer 1 can talk to Computer 2
• Computer 1
IP Address: 192.168. 1. 2
Subnet Mask: 255.255.255.0
• Computer 2
IP Address: 192.168. 1. 3
Subnet Mask: 255.255.255.0
Where the 0 is in the Subnet mask, there is no limit to communication at this part of the address. What this
means in the above example is, we can communicate with any device that has an IP address that begins with
192.168.1.x. (where x. are numbers between 0 and 255).
Gateway (and router)
A gateway is a network point that acts as an entrance to another network and sends data transmitted via the
network to an exact destination. The router knows where to direct data that arrives at the gateway. If a
destination is located on an external network, the router transmits data to the external network. If your network
communicates with other networks, you may need to configure the Gateway IP address. If you do not know
the Gateway IP address then contact your Network Administrator.
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