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A subnet mask defines the boundaries of an IP subnet and hides the network
address portion of an IP address. For example, if a network has a base IP
address of 192.168.0.0 and has a subnet mask of 255.255.255.0, then any data
going to an IP address outside of 192.168.0.X will be sent to that network’s
gateway.
Touch the “SubNet” button to enter the subnet mask. Enter the subnet mask
using the virtual keypad and confirm with “Enter”.
Gateway
A gateway is a node on a network that serves as an entrance to another
network. In enterprises, the gateway is the computer that routes the traffic
from a workstation to the outside network that is serving the Web pages. In
homes, the gateway is the ISP that connects the user to the internet.
In enterprises, the gateway node often acts as a proxy server and a firewall. The
gateway is also associated with both a router, which use headers and forward-
ing tables to determine where packets are sent, and a switch, which provides
the actual path for the packet in and out of the gateway.
The gateway address is usually set at 0.0.0.0. Touch the “Gateway” button to
enter the gateway address. Enter the gateway address using the virtual keypad
and confirm with “Enter”.
Port
Network ports can be either physical or virtual connection points. The NSG 3040
has a physical Ethernet port that allows it to be connected to a PC or router.
The port address for the NSG 3040 should be set to 1025. Touch the “Port”
button to enter the port number. Enter the port number using the virtual keypad
and confirm with “Enter”.
MAC address
Media Access Control (MAC) technology provides a unique identification and
access control for devices on an IP network. This address cannot be changed.
Media Access Control assigns a unique number, the MAC address, to each
network adapter.
